Seac Undersuit Unifleece Drysuit Undergament

Seac | SKU: 0110002000080A

(125)

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$129.90

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In stock — ships from Irvine, CA

Size

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All Seac size charts on one page. Imperial in bold, metric underneath.

Men’s wetsuits

Seac men's diving wetsuits

Man	Height ft/in · cm	Weight lb · kg	Chest in · cm
S	5′5″–5′9″ 166–175	121–150 55–68	34.6–36.2 88–92
M	5′7″–5′10″ 170–178	141–172 64–78	37–39.4 94–100
L	5′9″–6′0″ 176–184	165–194 75–88	38.6–40.9 98–104
XL	5′10″–6′2″ 178–189	185–214 84–97	40.2–43.3 102–110
2XL	6′1″–6′4″ 186–194	203–238 92–108	42.9–45.7 109–116
3XL	6′4″–6′6″ 192–198	240–260 109–118	44.9–47.2 114–120
4XL	6′4″–6′8″ 193–202	243–260 110–118	45.7–48.8 116–124

Seac men's freediving and spearfishing wetsuits

Man	Height ft/in · cm	Weight lb · kg	Chest in · cm
S	5′5″–5′9″ 166–175	121–150 55–68	34.6–36.2 88–92
M	5′7″–5′10″ 170–178	141–172 64–78	37–39.4 94–100
L	5′9″–6′0″ 176–184	165–194 75–88	38.6–40.9 98–104
XL	5′10″–6′2″ 178–189	185–214 84–97	40.2–43.3 102–110
2XL	6′1″–6′4″ 186–194	203–238 92–108	42.9–45.7 109–116
3XL	6′4″–6′6″ 192–198	240–260 109–118	44.9–47.2 114–120

Women’s wetsuits

Seac women's diving wetsuits

Lady	Height ft/in · cm	Weight lb · kg	Chest in · cm
XS	5′1″–5′3″ 155–161	115–128 52–58	30.3–32.7 77–83
S	5′3″–5′5″ 160–166	126–139 57–63	32.3–34.6 82–88
M	5′5″–5′7″ 165–171	137–157 62–71	34.3–36.2 87–92
L	5′8″–5′10″ 172–178	148–165 67–75	37–38.6 94–98
XL	5′10″–6′0″ 177–183	165–183 75–83	38.2–40.2 97–102
2XL	5′10″–6′1″ 179–185	185–203 84–92	39.4–41.7 100–106

Drysuits

Seac men's drysuits

Height, weight and chest

Man	Height ft/in · cm	Weight lb · kg	Chest in · cm
S	5′5″–5′9″ 166–175	121–150 55–68	34.6–36.2 88–92
M	5′7″–5′10″ 170–178	141–172 64–78	37–39.4 94–100
L	5′9″–6′0″ 176–184	165–194 75–88	38.6–40.9 98–104
L2P	5′9″–6′0″ 176–184	176–203 80–92	39.4–43.3 100–110
XL	5′10″–6′2″ 178–189	185–214 84–97	40.2–43.3 102–110
XL2P	5′10″–6′2″ 178–189	212–229 96–104	42.5–45.7 108–116
2XL	6′1″–6′4″ 186–194	203–238 92–108	42.9–45.7 109–116
XXL2P	6′1″–6′4″ 186–194	225–251 102–114	44.1–47.2 112–120
3XL	6′4″–6′6″ 192–198	240–260 109–118	44.9–47.2 114–120
XXXL2P	6′4″–6′6″ 192–198	247–265 112–120	45.3–48.4 115–123
4XL	6′4″–6′8″ 193–202	249–282 113–128	45.7–51.2 116–130

Boots

Man	Boots
S	40–41
M	41–42
L	42–43
L2P	42–43
XL	43–44
XL2P	43–44
2XL	44–45
XXL2P	44–45
3XL	45–46
XXXL2P	45–46
4XL	46/47

Hoods, boots and gloves

Seac hoods, footwear and gloves

Hoods

Hood size	Head circumference in · cm
XS	20.9–21.3 53–54
S	21.6–22 55–56
M	22.4–22.8 57–58
L	23.2–23.6 59–60
XL	24–24.4 61–62
2XL	24.8–25.1 63–64
3XL	25.6–26 65–66

Footwear

Footwear size	Foot length in · cm
2XS EU size 36–37 · US size 4–4.5 · UK size 4–4.5	9 23
XS EU size 37–38 · US size 4.5–5.5 · UK size 4.5–5.5	9.4 24
S EU size 38–39 · US size 5.5–6.5 · UK size 5.5–6.5	9.8 25
M EU size 40–41 · US size 7–8 · UK size 7–7.5	10.2 26
L EU size 42–43 · US size 8.5–9.5 · UK size 8–9	10.6 27
XL EU size 43–44 · US size 10–11 · UK size 9–10	11 28
2XL EU size 45–46 · US size 11.5–12.5 · UK size 11–11.5	11.4 29
3XL EU size 47–48 · US size 12.5–13 · UK size 12.5–13	11.8 30

For the most accurate fit, we recommend referring to the foot length indicated in the size chart.

Gloves

Glove size	EU size	Palm circumference in · cm
2XS	5	7.00–7.48 17.5–19
XS	6	7.48–8.07 19–20.5
S	7	8.07–8.66 20.5–22
M	8	8.66–9.25 22–23.5
L	9	9.25–9.84 23.5–25
XL	10	9.84–10.43 25–26.5
2XL	11	10.43–11.02 26.5–28

Fins

Seac F100 Pro fins

Size EU	Size UK	Size US	Weight lb · g	Fin length (A) in · cm
36/37	4/4.5	4/5	1.31 593	22.44 57
38/39	5.5/6.5	6/6.5	1.28 580	22.44 57
40/41	7/7.5	7/8	1.56 707	24.21 61.5
42/43	8/9	8.5/9.5	1.85 839	25.59 65
44/45	10/11	10/11	2.03 923	26.37 67
46/47	11.5/12.5	12/12.5	2.07 940	26.37 67

* The indicated weight refers to a single fin

Seac F1 fins

Size	EU size	Foot length (A) in · cm	Weight lb · g	Fin length (B) in · cm
XS/S	36/38	8.6–9.5 22–24	1.66 753	24.01 61
S/M	39/41	9.5–10.2 24–26	1.74 789	24.01 61
M/L	42/43	10.2–11 26–28	1.80 815	25.19 64
L/XL	45/47	11.4–12.2 29–31	2.11 955	26.37 67

From Seac’s chart: * The indicated weight refers to a single fin

Seac Propulsion fins

Size	Weight lb · g	Fin length (A) in · cm
S/M Size EU 39/41 · Size UK 6.5–7.5 · Size US 6.5–8	1.88 852	24.40 62
M/L Size EU 42/44 · Size UK 8.5/10 · Size US 8.5/10	2.22 1009	26.37 67
L/XL Size EU 45/47 · Size UK 11/12.5 · Size US 11/12.5	2.56 1163	27.16 69

From Seac’s chart: The indicated weight refers to a single fin The sizes are indicatives and depends at the socks you want to wear

Seac Motus fins

Size EU	Size UK	Size US	Weight lb · g	Fin length (A) in · cm
35/36	3/4	3/3.5	2.09 948	33.07 84
36/38	3.5/5	4.5/5.5	2.09 948	33.07 84
39/40	5.5/6.5	6.5/7	2.13 965	33.85 86
41/42	7/8	8/8.5	2.14 972	34.25 87
43/44	8.5/9.5	9.5/10	2.19 993	34.64 88
45/46	10/11	10/11	2.35 1064	35.43 90
47/48	12/13	12.5/13.5	2.51 1138	35.82 91

From Seac’s chart: * The indicated weight refers to a single fin

Seac Talent fins

Size EU	Size UK	Size US	Weight lb · g	Fin length (A) in · cm
35/36	3/4	3/3.5	2.09 948	33.07 84
36/38	3.5/5	4.5/5.5	2.09 948	33.07 84
39/40	5.5/6.5	6.5/7	2.13 965	33.85 86
41/42	7/8	8/8.5	2.14 972	34.25 87
43/44	8.5/9.5	9.5/10	2.19 993	34.64 88
45/46	10/11	10/11	2.35 1064	35.43 90
47/48	12/13	12.5/13.5	2.51 1138	35.82 91

From Seac’s chart: * The indicated weight refers to a single fin

Source: Seac’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) and Seac’s current size chart. Where the chart prints only one unit, we converted the other: inches from centimeters (to the nearest 0.1″); feet and inches from centimeters (to the nearest inch); pounds from kilograms (to the nearest pound).

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Payment & Security

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Product Information

The Seac Undersuit Unifleece Drysuit Undergarment is a lightweight, two-layer insulating layer worn beneath a drysuit for cold-water diving, weighing about 600 grams and closing with a double-ended front zipper for quick entry and exit.

Who it is for

This undersuit is built for divers who need added warmth under a drysuit in cold environments. It is designed to pair with the Seac Warmdry and Seac Dry Plus drysuits, making it a fitted layering option for divers already using one of those Seac drysuits, though it can be worn under a drysuit generally for insulation and moisture management.

Key details

Two-layer construction with a water-repellent outer layer to help keep moisture away from the body
Total weight of about 600 grams
Double-ended front zipper for easy donning and removal
Wrist and ankle stirrups that hold the undersuit in place and prevent fabric bunching when pulling on a drysuit
Lateral zippered pockets for easy-access storage of small gear

Compatibility and sizing

The Unifleece is designed to be worn with the Seac Warmdry and Seac Dry Plus drysuits. It is available in sizes S, M, L, XL, 2XL, and 3XL to fit a range of body types under a drysuit.

DiveCatalog.com is an authorized Seac dealer and a dive shop based in Irvine, California, serving divers since 2003. Call or chat with our team at 888-701-4017 if you have questions about sizing or drysuit compatibility.

⚠️ 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 should I wear under a drysuit for cold water diving?

A dedicated undergarment like the Seac Unifleece is designed for this purpose. It is a lightweight, 2-layer undersuit with a water-repellent outer layer that adds warmth beneath a drysuit, and it is built to pair with the Seac Warmdry and Seac Dry Plus drysuits for cold-water dives.

What sizes does the Seac Unifleece undersuit come in?

The Seac Unifleece is available in sizes S, M, L, XL, 2XL, and 3XL, allowing divers to choose a size that fits comfortably beneath their drysuit.

Which drysuits is the Seac Unifleece designed to work with?

Seac designed the Unifleece undersuit to be worn with the Seac Warmdry and Seac Dry Plus drysuits, pairing the insulating layer with these specific drysuit models.

How much does the Seac Unifleece undersuit weigh?

The Seac Unifleece has a total weight of about 600 grams, reflecting its lightweight, 2-layer construction designed to add warmth without excess bulk under a drysuit.

Review summary

4.2 125 ratings across the web

86%

(1178)

(114)

(37)

(16)

(31)

Like dis

Like dis project

Excellent wetsuit but will it crush quickly like other wetsuits?

I purchased a BARE 5mm Reactive wetsuit (open box), which was like new, to replace my 1.5 yr old BARE 5mm Velocity wetsuit which had collapsed to only 2.5mm after 3 diving trips (~100 dives). The Reactive wetsuit is well constructed and very flexible. I had to increase the size of the Reactive suit, as it was smaller than the BARE Velocity suit of the same size. Tremendous customer service by Dive Catalog to exchange the wetsuit for proper size. I hope the Reactive suit does not crush so quickly like my other wetsuits (BARE, Henderson, Pinnacle). Hoping that the new technology in this suit will keep me warm below the thermocline.

Perfectly Built

Best of the many many diver hangers in my life. Easily supports my steel-plated BCD, while still donned with all of my accessories. No cracks, bends, or dents. Has even supported my BCD w/ a steel 100 tank attached (not recommended, for safety purposes, though).

Will continue to use this hanger for the long-term. No brainer.

Go-to Dive Hanger

This is a must-have for every diver. It's the quintessential hanger for all dive gear in one small package.

DiveCatalog's "Quick Dry Multi Accessory Dive Gear Hanger for Boots, Gloves, Hood" is set at a great price for a great product. Versatile enough that I've purchased extra hangers to organize my BMX racing gear.

Must-have for divers and anyone looking to organize their adventurous outdoor activities equipment.

Solid Hanger w/ Tons of Options

Does it's job and then some. The added accessory arms gives you options for a multitude of storage solutions. Solid build, solid pricing, must have for owns of dive gear.

Total weight	600 g
Construction	2-layer
Closure	Double-ended front zipper
Stirrups	Wrist and ankle
Pockets	Lateral zippered pockets
Compatible drysuits	Seac Warmdry, Seac Dry Plus
Available sizes	S, M, L, XL, 2XL, 3XL
Product type	Drysuit undergarment, unisex

Seac Undersuit Unifleece Drysuit Undergament

Pick accessories — 90% off with your $50+ order

Payment & Security

Product Information

Who it is for

Key details

Compatibility and sizing

Frequently Asked Questions

What should I wear under a drysuit for cold water diving?

What sizes does the Seac Unifleece undersuit come in?

Which drysuits is the Seac Unifleece designed to work with?

How much does the Seac Unifleece undersuit weigh?

Review summary