Scubapro Alpha 4 MM Neoprene Dive Boot for Cold Water Diving

Scubapro | SKU: 57.100.100

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$109.00

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In stock — ships from Irvine, CA

Size

XS (X-Small)

Pickup available at In Store

Usually ready in 2 hours

Scubapro size charts by gear type. Wetsuits and most fins link to their own chart pages. Imperial in bold, metric underneath.

Wetsuits

Scubapro’s wetsuit charts each have their own page:

Rash guards and exposure wear

Scubapro men's and women's exposure protection

Men

Dimensions	Height ft/in · cm	Weight lb · kg
Men
XS	5′5″–5′7″ 165–170	142–167 65–75
S	5′7″–5′9″ 170–175	153–188 70–80
ST	5′9″–5′11″ 175–180	153–188 70–80
MS	5′7″–5′9″ 170–175	164–189 75–85
M	5′9″–5′11″ 175–180	164–189 75–85
MT	5′11″–6′1″ 180–185	164–189 75–85
LS	5′9″–5′11″ 175–180	175–200 80–90
L	5′11″–6′1″ 180–185	175–200 80–90
LT	6′1″–6′3″ 185–190	175–200 80–90
XLS	5′11″–6′1″ 180–185	186–211 85–95
XL	6′1″–6′3″ 185–190	186–211 85–95
XLT	6′3″–6′5″ 190–195	186–211 85–95
2XLS	6′1″–6′3″ 185–190	197–222 90–100
2XL	6′3″–6′5″ 190–195	197–222 90–100
2XLT	6′5″+ >195	197–222 90–100
3XLS	6′3″–6′5″ 190–195	208–235 95–105
3XL	6′5″+ >195	208–235 95–105
4XL	6′5″+ >195	219–244 100–110
5XL	6′5″+ >195	230–255 105–115

Women

Dimensions	Height ft/in · cm	Weight lb · kg
Women
2XS - 0	4′11″–5′1″ 150–155	93–118 42–54
XS - 2	5′1″–5′3″ 155–160	106–131 47–59
S - 4	5′3″–5′5″ 160–165	115–140 52–64
ST - 4T	5′5″–5′7″ 165–170	115–140 52–64
MS - 6S	5′3″–5′5″ 160–165	126–151 57–69
M - 6	5′5″–5′7″ 165–170	126–151 57–69
MT - 6T	5′7″–5′9″ 170–175	126–151 57–69
LS - 8S	5′5″–5′7″ 165–170	137–162 62–74
L - 8	5′7″–5′9″ 170–175	137–162 62–74
LT - 8T	5′9″–5′11″ 175–180	137–162 62–74
XLS - 10S	5′7″–5′9″ 170–175	148–173 67–79
XL - 10	5′9″–5′11″ 175–180	148–173 67–79
XLT - 10L	5′11″–6′1″ 180–185	148–173 67–79
2XLS - 12S	5′9″–5′11″ 175–180	159–184 72–84
2XL - 12	5′11″–6′1″ 180–185	159–184 72–84
3XL - 14	>6′1″ >185	>181 >82
4XL - 16	>6′1″ >185	>181 >82

From Scubapro’s chart: These charts are intended to act as a sizing guide. We recommend that all suits be tried on to ensure a perfect fit. Wetsuit chart applies to the following: Exodry, Everdry 4, Evertech Breathable, NovaScotia Semi-dry, all Everflex wetsuits, Profile 0.5, Sport 7mm Semi-dry, Sport 3,5,7mm steamers, Oneflex wetsuits, Tropical Steamer, Everflex Skin Suit, Everflex Hooded Vest 5mm, Everflex Hooded Vest 2.5mm, Pyroflex Steamers & Tops, Hybrid Jane, Hybrid shorty, Hybrid Shorts, Hybrid Cargo Shorts

Scubapro men's and women's rash guards

Size	Chest in · cm	Waist in · cm	Height ft/in · cm
Men
XS	30–32 77–81	28–29 70–74	5′5″–5′7″ 165–170
S	32–34 82–86	30–31 75–79	5′7″–5′9″ 170–175
M	34–36 87–91	31–33 80–84	5′9″–5′11″ 175–180
L	36–38 92–96	33–35 85–89	5′11″–6′1″ 180–185
XL	38–40 97–101	35–37 90–94	6′1″–6′3″ 185–190
2XL	40–42 102–106	37–39 95–99	6′3″–6′5″ 190–195
3XL	42–44 107–111	39–41 100–104	6′5″–6′7″ 195–200
Women
XS	26–28 66–70	23–25 59–63	5′1″–5′3″ 155–160
S	28–29 70–74	25–26 63–67	5′3″–5′5″ 160–165
M	29–31 74–78	26–28 67–71	5′5″–5′7″ 1675–170
L	31–32 78–82	28–30 71–75	5′7″–5′9″ 170–175
XL	32–34 82–86	30–31 75–79	5′9″–5′11″ 175–180

From Scubapro’s chart: This chart is intended to act as a sizing guide. We recommend that undergarments be tried on to ensure a perfect fit.

Drysuits

Scubapro drysuits use the exposure protection chart above.

Exposure protection chart

Hoods

Scubapro hoods

Size	Head circumference (approx.) in · cm
XS/S	20.5 52
S/M	21 53
M/L	21.5 55
L/XL	22 56
XL/2XL	22.5 57

From Scubapro’s chart: This chart is intended to act as a sizing guide. We recommend that all hoods be tried on to ensure a perfect fit.

Gloves

Scubapro dive gloves

Size	Glove length in · cm	Palm girth in · cm	Glove opening in · cm
2XS	10–11 26–28	7–8 18–20	5–6 14–16
XS	10–11 27–29	7–8 19–21	6–7 15–17
S	11–12 28–30	8–9 20–22	6–7 16–18
M	11–12 29–31	8–9 21–23	7–8 17–19
L	12–13 30–32	9–10 22–24	7–8 18–20
XL	12–13 31–33	9–10 23–25	7–8 19–21
2XL	13–14 32–34	10–11 24–26	8–9 20–22

Tolerance: +- 0.3, .80

Boots and socks

Scubapro men's boots and socks

Men size	USA	UK	EU
3XS	4	3	34–35
2XS	5	4	36
XS	6	5	37–38
S	7	6	39
M	8	7	40–41
L	9	8	42
XL	10	9	43–44
2XL	11	10	45
3XL	12	11	46–47
4XL	13	12	48

BCDs

Scubapro Hydros Pro 2

Height and weight

Size	Height ft/in · cm	Weight lb · kg
XS	4′11″–5′2″ 150–157	95–145 45–65
S	5′2″–5′7″ 157–170	120–155 54–70
M	5′7″–6′0″ 170–183	143–187 65–85
L	5′10″–6′2″ 179–188	176–242 80–110
XL–2XL	6′1″–6′6″ 185–199	220–285 100–130

Cummerbund circumference

Size	Cummerbund circumference in · cm
XS	26–38 66–97
S	27–41 68–105
M	28–46 71–116
L	30–50 76–128
XL–2XL	32–59 81–149

Lift, jacket weight with BPI and jacket weight with AIR2

Size	Lift lb · N	Jacket weight with BPI lb · kg	Jacket weight with AIR2 lb · kg
XS	35 150	8.4 3.8	8.9 4.0
S	35 150	8.4 3.8	8.9 4.0
M	40 170	8.8 4.0	9.4 4.3
L	40 170	8.9 4.1	9.5 4.3
XL–2XL	40 170	8.9 4.1	9.5 4.3

Scubapro Hydros Pro BCD, male and female

Height and weight

Size	Height ft/in · cm	Weight lb · kg
Male
S	5′2″–5′7″ 157–170	120–155 54–70
M	5′7″–6′0″ 170–183	143–187 65–85
L	5′10″–6′2″ 179–188	176–242 80–110
XL–2XL	6′1″–6′6″ 185–199	220–285 100–130
Female
XS–S	4′11″–5′7″ 150–170	95–145 45–65
M	5′3″–5′11″ 160–180	120–170 55–77
L	5′7″–6′1″ 170–185	150–210 68–95

Cummerbund circumference

Size	Cummerbund circumference in · cm
Male
S	26–39 66–99
M	28–45 71–115
L	30–50 76–127
XL–2XL	32–58 81–147
Female
XS–S	26–39 66–99
M	28–45 71–115
L	30–50 76–127

Lift, weight system primary and weight system trim

Size	Lift lb · N	Weight system primary lb · kg	Weight system trim lb · kg
Male
S	36 160	18 8	9 4
M	40.5 180	18 8	9 4
L	40.5 180	18 8	9 4
XL–2XL	40.5 180	18 8	9 4
Female
XS–S	36 160	18 8	9 4
M	36 160	18 8	9 4
L	40.5 180	18 8	9 4

From Scubapro’s chart: This size chart is to be used as a guide only. We recommend a proper fitment before selecting the size.

Scubapro Glide BCD

Height, weight and cummerbund circumference

Size	Height ft/in · cm	Weight lb · kg	Cummerbund circumference in · cm
XS	5′0″–5′5″ 152–165	100–125 45–57	28–36 71–91
S	5′2″–5′7″ 157–170	120–155 54–70	30–38 76–97
M	5′5″–5′10″ 165–178	150–170 68–77	34–43 86–109
L	5′7″–6′0″ 170–183	170–200 77–91	38–46 97–117
XL	6′0″–6′3″ 183–191	195–235 88–107	42–52 107–132
2XL	6′2″–6′5″ 188–196	230–270 104–122	50–60 127–152

Lift and jacket weight with BPI

Size	Lift lb · kg	Jacket weight with BPI lb · kg
XS	22.5 10.2	7.9 3.6
S	29.2 13.2	8.1 3.7
M	31.5 14.2	8.4 3.8
L	31.5 14.2	8.6 3.9
XL	33.7 15.4	8.8 4.0
2XL	38.2 17.3	9.0 4.1

Scubapro Level BCD

Height, weight and cummerbund circumference

Size	Height ft/in · cm	Weight lb · kg	Cummerbund circumference in · cm
XS	5′0″–5′5″ 152–165	99–123 45–56	31–36 79–91
S	5′2″–5′7″ 157–170	119–154 54–70	35–41 89–104
M	5′7″–5′11″ 170–180	150–170 68–77	37–43 94–109
L	5′11″–6′1″ 180–185	170–209 77–95	38–44 97–112
XL	6′1″–6′3″ 185–190	194–240 88–109	40–47 102–119

Lift and jacket weight with BPI

Size	Lift lb · kg	Jacket weight with BPI lb · kg
XS	22.5 10.2	6.4 2.9
S	27 12.2	6.6 3.0
M	29.2 13.2	6.6 3.0
L	33.7 15.4	6.6 3.0
XL	38.2 17.3	6.6 3.0

Scubapro X-Black BCD

Height, weight and cummerbund circumference

Size	Height ft/in · cm	Weight lb · kg	Cummerbund circumference in · cm
S	5′2″–5′7″ 157–170	119–154 54–70	34–36 86–92
M	5′7″–5′11″ 170–180	150–170 68–77	37–41 95–105
L	5′10″–6′1″ 178–185	170–209 77–95	42–46 106–118
XL	6′1″–6′3″ 185–190	194–238 88–108	44–50 113–127
2XL	6′3″–6′6″ 190–198	225–269 102–122	46–54 118–138

Lift and jacket weight with BPI

Size	Lift lb · kg	Jacket weight with BPI lb · kg
S	38.2 17.3	9.5 4.3
M	44.9 20.3	9.7 4.4
L	49.5 22.4	9.9 4.5
XL	56.2 25.5	10.1 4.6
2XL	65.1 29.6	10.3 4.7

Scubapro Seahawk 2 BCD

Height, weight and cummerbund circumference

Size	Height ft/in · cm	Weight lb · kg	Cummerbund circumference in · cm
2XS	4′8″–5′2″ 147–160	79–99 36–45	28–37 72–93
XS	5′0″–5′4″ 152–165	100–123 45–56	30–39 77–99
S	5′2″–5′7″ 157–170	119–154 54–70	30–38 76–97
M	5′7″–5′11″ 170–180	150–170 68–77	32–40 81–102
L	5′10″–6′1″ 178–185	170–209 77–95	38–46 96–116
XL	6′1″–6′3″ 185–190	194–240 88–109	44–52 112–132
2XL	6′2″–6′5″ 188–196	229–271 104–123	50–60 127–152

Lift and jacket weight with BPI

Size	Lift lb · kg	Jacket weight with BPI lb · kg
2XS	38.2 17.3	6.8 3.1
XS	38.2 17.3	6.8 3.1
S	54 24.4	7.0 3.2
M	54 24.4	7.3 3.3
L	54 24.4	7.3 3.3
XL	54 24.4	7.5 3.4
2XL	54 24.4	7.5 3.4

Scubapro Navigator Lite BCD

Height and weight

Size	Height ft/in · cm	Weight lb · kg
2XS–M	4′10″–5′11″ 147–180	79–170 36–77
M–2XL	5′11″–6′5″ 180–196	170–270 77–120

Cummerbund circumference

Size	Cummerbund circumference in · cm
2XS–M	28–40 70–100
M–2XL	40–60 100–150

Lift, jacket weight with BPI and jacket weight with AIR2

Size	Lift lb · kg	Jacket weight with BPI lb · kg	Jacket weight with AIR2 lb · kg
2XS–M	38.2 17.3	5.5 2.5	5.7 2.6
M–2XL	38.2 17.3	6.0 2.7	6.2 2.8

Fins

Each of these Scubapro fin charts has its own page:

Scubapro Go Sport open heel fins

US men	3mm boot	5mm boot	Heavy/dry boot
4 US women 5 · UK 3 · EU 35–36	XS	XS	XS
5 US women 6 · UK 4 · EU 37	XS	XS	S
6 US women 7 · UK 5 · EU 38	S	S	S
7 US women 8 · UK 6 · EU 39–40	S	S	M
8 US women 9 · UK 7 · EU 41	S	M	M
9 US women 10 · UK 8 · EU 42	M	M	L
10 US women 11 · UK 9 · EU 43–44	M	L	L
11 US women 12 · UK 10 · EU 45	L	L	XL
12 US women 13 · UK 11 · EU 46	L	L	XL
13 US women 14 · UK 12 · EU 47	L	XL	XL
14 US women 15 · UK 13 · EU 48–49	XL	XL	—
15 US women 16 · UK 14 · EU 50	XL	XL	—
16 US women 17 · UK 15 · EU 51–52	XL	—	—

Source: Scubapro’s size chart (original chart 1, original chart 2, original chart 3, original chart 4, original chart 5, original chart 6, original chart 7, original chart 8, original chart 9, original chart 10, original chart 11, original chart 12, original chart 13, original chart 14, original chart 15, original chart 16, original chart 17, original chart 18, original chart 19, original chart 20).

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Payment & Security

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Save with Open Box or Used Purchase

Used Scubapro Alpha Boot 4mm

Sale price $75.95 Regular price $108.99
Used Scubapro Alpha Boot 4mm

Sale price $87.20 Regular price $109.00

Product Information

The SCUBAPRO Alpha Dive Boot 4mm is a recreational scuba boot built from 3mm X-Foam neoprene with a laced, sport-shoe-style closure instead of a zipper, a Velcro ankle strap, and an anti-slip sole, designed for temperate to cold-water diving.

Who it is for

This boot suits recreational divers who want the snug, athletic-shoe fit of a laced closure without the failure points of a traditional zipper. The anti-slip sole, built-in arch support, and fin strap keeper make it a practical choice for shore entries over rocky or uneven terrain as well as boat dives where secure footing on wet decks matters.

Key details

3mm X-Foam neoprene, a petroleum-free, limestone-based material
Two-layer neoprene and nylon construction with an anti-abrasion exterior fabric
No-zipper, laced closure with a Velcro ankle strap
Diamond Span interior lining for warmth, comfort, and quick drying
Anti-slip sole with built-in arch support and a fin strap keeper
Product weight of approximately 0.95 lb (size XS)
Rated for recreational diving activity

Compatibility and sizing

SCUBAPRO publishes the Alpha Dive Boot 4mm in sizes XS through 3XL. This listing is for size XS, item number 57.100.100, UPC 4048336411714. Try the boot on with the dive socks or thin layers you actually plan to wear, since your fin foot pocket also needs to accommodate the boot's thickness.

DiveCatalog.com is an authorized SCUBAPRO dealer and has been a dive shop in Irvine, California since 2003. Call 888-701-4017 or chat with us if you have questions about sizing or fin compatibility before you order.

⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

Frequently Asked Questions

What thickness of dive boots, gloves, or hood should I choose?

As a general rule, thicker neoprene insulates more, so colder water pushes you toward thicker accessories, but fit, dive length, and personal cold tolerance matter as much as the millimeter number. Divers commonly lose a great deal of heat through the head, so a hood is often the highest-value warmth upgrade for the money. Remember that every added piece of neoprene also adds buoyancy you will need to account for.

How should dive boots fit?

Boots should fit like a snug athletic shoe, with no heel lift and no crushed toes; a little water inside is normal, a sloshing pocket is not. Try them on with the socks you would actually dive, and remember your fin foot pocket has to accommodate the boot. Hard-sole boots protect on rocky shore entries, while soft-sole boots are lighter and pack smaller for boat and travel diving.

How should dive gloves fit?

Gloves should be snug across the palm with fingertips reaching the ends without bunching, since trapped air and loose fingertips destroy dexterity. Thicker gloves are warmer but make buckles, clips, and inflator buttons harder to operate, so choose the thinnest glove that keeps you comfortable in your conditions. Try working a clip or buckle while wearing them before you commit.

How should a dive hood fit?

A hood should seal around the face and neck without restricting your throat or jaw, and lie flat on your head without pulling the mask strap out of position. A loose hood flushes cold water continuously, while an overly tight one is distracting and uncomfortable. Many hoods have a vent to release air trapped during descent, so check yours and burp out any trapped air before you go down.

Why does new neoprene feel so tight?

New neoprene compresses and relaxes with use, so a boot, glove, or hood that feels firm out of the packaging usually settles slightly after a few dives. It should still be snug afterward rather than loose, because neoprene that stretches into a loose fit was probably oversized to begin with. Buy for a snug fit when new, but never for a fit that restricts circulation or breathing.

Do I need to change my weighting when I add a hood, gloves, and boots?

Yes, because every piece of neoprene you add is buoyancy, and a hood, boots, and thick gloves together can shift your weighting noticeably. Do a proper buoyancy check any time you change your exposure protection rather than assuming your usual weight still works. The weight-check procedure is covered in your training, and a dive professional can help you re-do it.

How do I care for dive boots, gloves, and hoods?

Rinse them inside and out in fresh water after every dive day, since they hold sweat and salt more than any other gear, and dry them fully inside-out before packing. Dry them out of direct sunlight and never on a heater, because heat hardens neoprene and weakens glued seams. Store them dry and unfolded, as damp neoprene sealed in a bag is how gear picks up a permanent smell.

Does the SCUBAPRO Alpha Dive Boot 4mm have a zipper?

No, it does not use a zipper. The Alpha Dive Boot 4mm uses a laced, sport-shoe-style closure combined with a Velcro ankle strap, which gives a snug athletic fit while removing a common point of failure found on zippered dive boots.

What sizes does the SCUBAPRO Alpha Dive Boot 4mm come in?

SCUBAPRO publishes the Alpha Dive Boot 4mm in sizes XS through 3XL. This listing is for size XS, item number 57.100.100, UPC 4048336411714, so confirm the size you need matches this SKU before ordering.

What material is the SCUBAPRO Alpha Dive Boot 4mm made from?

It is made from X-Foam neoprene, a petroleum-free, limestone-based neoprene, combined with nylon and an anti-abrasion exterior fabric. The interior uses a Diamond Span lining for warmth, comfort, and quick drying between dives.

How much does the SCUBAPRO Alpha Dive Boot 4mm weigh?

SCUBAPRO lists the size XS Alpha Dive Boot 4mm at approximately 0.95 lb.

Item Number	57.100.100
UPC	4048336411714
Marketing Product Type	Boot
Thickness	3mm
Material	X-Foam Neoprene (petroleum-free, limestone-based)
Closure	No Zipper (laced with Velcro ankle strap)
Sole Type	Built-in arch support, Diamond Span interior, fin strap keeper
Product Weight	0.95 lb (size XS per manufacturer; 0.88 lb listed on general product page)
Activity	Recreational
Available Sizes	XS (5) through 3XL (12), eight sizes

Scubapro Alpha 4 MM Neoprene Dive Boot for Cold Water Diving

Pick an accessory — 90% off with your $250+ order

Payment & Security

Save with Open Box or Used Purchase

Product Information

Who it is for

Key details

Compatibility and sizing

Frequently Asked Questions

What thickness of dive boots, gloves, or hood should I choose?

How should dive boots fit?

How should dive gloves fit?

How should a dive hood fit?

Why does new neoprene feel so tight?

Do I need to change my weighting when I add a hood, gloves, and boots?

How do I care for dive boots, gloves, and hoods?

Does the SCUBAPRO Alpha Dive Boot 4mm have a zipper?

What sizes does the SCUBAPRO Alpha Dive Boot 4mm come in?

What material is the SCUBAPRO Alpha Dive Boot 4mm made from?

How much does the SCUBAPRO Alpha Dive Boot 4mm weigh?