Scubapro K2 Extreme Steamer Cold-Water Thermal Protection Full Mens Drysuit Undergarment

Scubapro | SKU: 78.171.100

(65)

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$459.00

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In stock — ships from Irvine, CA

Size

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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Save with Open Box or Used Purchase

Used Scubapro K2 Extreme Steamer Cold-Water Thermal Protection Full Mens Drysuit Undergarment

Sale price $367.20 Regular price $424.00

Product Information

The Scubapro K2 Extreme Steamer Cold-Water Thermal Protection Full Mens Drysuit Undergarment, listed by SCUBAPRO as the K2 Extreme One-Piece Undersuit (Man), is a one-piece drysuit undergarment built from breathable, stretchy dual fleece with anti-squeeze padding on the shoulders, chest and knees, and it is offered in sizes XS through 3XL for use with trilaminate drysuits.

Who it is for

It is made for the cold-water drysuit diver who wants full-body coverage in a single garment instead of separate top and bottom layers. SCUBAPRO classifies the activity level as technical, so it suits divers running longer, gear-intensive dives in trilaminate shells where compression at the shoulders, chest and knees is a real comfort issue. The leg holes are adaptable for P-valve installation, so it also works for divers who dive with a P-valve fitted to their suit.

Key details

Dual fleece body fabric at 629 g/m² (+/-10%), stepped up to 919 g/m² across the shoulders, chest and knees for anti-squeeze protection.
Eco Dual Fleece interior with a plush lining against the skin.
Front double slider zipper for easier donning and doffing.
Two zippered storage pockets, one on each hip.
Elastic wrist loops and heel straps to stop the fabric riding up as you pull on a drysuit.
Size M is listed as 3.836 lbs and 62.99 inches on SCUBAPRO's US page, and 1.52 kg and 148 cm on the EU page.

Compatibility and sizing

Compatible with trilaminate drysuits. Seven sizes are published: XS (78.171.100), S (78.171.200), M (78.171.300), L (78.171.400), XL (78.171.500), 2XL (78.171.600) and 3XL (78.171.700).

What's in the box

One K2 Extreme steamer-style one-piece undersuit (storage bag not included)

DiveCatalog.com is an authorized Scubapro dealer and a real dive shop in Irvine, California since 2003. Call 888-701-4017 or start a chat if you want help choosing a size or confirming fit under your drysuit.

⚠️ 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 sizes does the Scubapro K2 Extreme Steamer come in?

Seven sizes are published: XS, S, M, L, XL, 2XL and 3XL, matching SKUs 78.171.100 through 78.171.700. For reference, Medium is listed as 3.836 lbs / 62.99 in on SCUBAPRO's US page and 1.52 kg / 148 cm on the EU page. If you are between sizes or layering under a specific drysuit, call DiveCatalog.com at 888-701-4017 and we can talk it through with you.

Can a P-valve be used with this undersuit?

Yes. The leg holes on the K2 Extreme one-piece undersuit are adaptable for P-valve installation, so divers running a P-valve in their drysuit can fit the undersuit accordingly. The suit also uses a front double slider zipper, which makes getting in and out of the garment easier before and after a dive.

What makes the shoulders, chest and knees different from the rest of the suit?

Those three areas use a heavier 919 g/m² dual fleece panel, compared with 629 g/m² (+/-10%) through the rest of the body. SCUBAPRO calls this anti-squeeze or compression protection padding, and it targets the points where drysuit and harness pressure compresses insulation most, helping preserve warmth and comfort on gear-intensive dives.

Does the K2 Extreme Steamer include a storage bag?

No. SCUBAPRO lists the storage bag as not included, so the package contains the one-piece steamer-style undersuit itself. The undersuit does have two zippered storage pockets, one on each hip, plus elastic wrist loops and heel straps that keep the fleece from riding up while you pull on a drysuit.

Review summary

4.5 65 ratings across the web

Written reviews for this one are still few, so take the feedback as early signals. This is a one-piece drysuit undergarment built from breathable, stretchy dual fleece at 629 g/m2, stepped up to 919 g/m2 across the shoulders, chest and knees for anti-squeeze protection. It has a front double slider zipper, two zippered hip pockets, elastic wrist loops and heel straps, and leg holes adaptable for a P-valve. One early reviewer reports it added enough warmth in 50 to 60 degree water and felt comfortable under compression at depth. Sizes XS through 3XL suit cold-water divers in trilaminate drysuits.

What reviewers like

Adds enough insulation for 50 to 60 degree water where a thinner undersuit fell short

Padding makes it more comfortable at depth when the suit squeezes

Eco Dual Fleece interior with a plush lining against the skin

Good to know

Costs more than other undersuits

5 stars: 1 (100%)
4 stars: 0 (0%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

You Get What You Pay For

Costs More But You Get More with this K2 - Scubapro Extreme undersuit. Switched from a 4 mm drysuit to a Scubapro Evertech drysuit and needed to make up the insulation. Started with Seac Unifleece but not enough warmth in 50-60 degree water, so I decided to go with this. And because it is padded up like a Batman body suit it’s more comfortable at depth when squeezed. I will take this snowboarding in Tahoe this winter too, to maximize the spend.

DiveCat. has good easy-to-shop site and their rewards/loyalty program is great.

What is lowest water temperature where this keeps you warrm

DiveCatalog.com

Hi,

Of course, this item is marked as openboxed due to the packaging being damaged during it's move in the warehouse!

Sincerely,
Emily and the DiveCatalog team!

Product name	K2 Extreme One-Piece Undersuit (Man)
Type	One-piece steamer drysuit undergarment
Material	Dual fleece, breathable and stretchy
Fabric weight	629 g/m² (+/-10%)
Reinforced panel weight	919 g/m² on shoulders, chest and knees
Interior lining	Fleece / plush (Eco Dual Fleece interior with plush lining)
Zipper position	Front, double slider
Number of pockets	2 (zippered, both hips)
P-valve	Leg holes adaptable for P-valve installation
Weight (size M)	3.836 lbs (US site) or 1.52 kg (EU site)
Length (size M)	62.99 in (US site) or 148 cm (EU site)
Drysuit compatibility	Trilaminate drysuits
Activity	Technical
Gender	Men
Sizes	XS, S, M, L, XL, 2XL, 3XL
SKUs	78.171.100 (XS) to 78.171.700 (3XL)
UPC (XS)	4048336412391
Storage bag included	No

Scubapro K2 Extreme Steamer Cold-Water Thermal Protection Full Mens Drysuit Undergarment

Pick accessories — 90% off with your $250+ order

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