Clark Full Wetsuit - Reef 5/4mm
Clark 5/4mm is built for the coldest conditions. Full sleeves, full-length legs, and maximum thermal lining through the chest and back panels keep you warm during long winter sessions in very cold water. Thick enough to handle the cold, flexible enough to keep you moving.
Made with Yamamoto limestone neoprene, sourced from calcium carbonate, not petroleum. Softer, lighter, and more heat-efficient than conventional neoprene. Glued and blind-stitched (GBS) seams provide maximum protection against water entry in cold and very cold conditions. A back-zip entry makes it easy to get in and out before and after sessions.
Key details
- 5/4mm Yamamoto limestone neoprene
- GBS seams for maximum water resistance in very cold conditions
- Full thermal internal lining through chest and back panels
- Recycled internal lining from post-consumer plastic bottles
- Back-zip entry
- Recommended water temperature: below 50°F (below 10°C)
Fit note
If you are between sizes, we recommend sizing up. Wetsuits should feel snug with no gaps at the lower back or neck.
- Surfing
- Stand-up paddleboarding
- Wakeboarding
- Kitesurfing
- Windsurfing
- Snorkelling
- Scuba diving
- Open-water swimming
- Foiling & e-foiling
Warmth & conditions:
A 5/4mm wetsuit is ideal for water temperatures below 50°F (below 10°C). This covers the coldest surf conditions — Pacific Northwest winter, northern Europe, Iceland, Japan winter, and any location where cold water demands maximum insulation.
Need less warmth? → Clark 4/3mm (50–58°F / 10–14°C) · Clark 3/3mm (58–66°F / 14–19°C) · Clark 2/2mm (64–72°F / 18–22°C)
Choosing your size
Clark fullsuits are designed to fit snugly for warmth and performance.
- Choose your usual wetsuit size
- 2/2mm: very stretchy — a close fit is recommended
- 3/3mm, 4/3mm & 5/4mm: slightly firmer — if between sizes, consider sizing up
- A snug feel when dry is normal and softens once wet
Choosing your thickness
Clark is available in 2/2mm, 3/3mm, 4/3mm, and 5/4mm, offering progressive warmth.
- 2/2mm → mild water, warmer sessions
- 3/3mm → cooler water, everyday use
- 4/3mm → cold water, winter surf
- 5/4mm → below 50°F (below 10°C) — very cold water, maximum insulation, long winter sessions
Choose lighter thicknesses for flexibility, thicker options for maximum warmth.
For temperature guidance, see Designed For.
Need help?
If you’re unsure about size or thickness, our team is happy to help.
Which thickness is the Clark 5/4mm for?
The Clark 5/4mm is designed for water temperatures below 50°F (below 10°C). It provides maximum insulation for very cold water, long winter sessions, and conditions where staying warm is critical to staying in the water.
What is Yamamoto neoprene?
Yamamoto neoprene is made from calcium carbonate derived from limestone, not petroleum. It is softer, lighter, and more flexible than conventional neoprene, and has a lower environmental impact. Abysse uses Yamamoto #39 limestone neoprene across the Clark range.
What is ECOPRENE?
ECOPRENE is Abysse's proprietary material system combining Yamamoto limestone neoprene with recycled bottle linings. It is designed as a lower-impact alternative to petroleum-based wetsuits without compromising warmth or flexibility.
Does the 5/4mm Clark have thermal lining?
Yes. The Clark 5/4mm features a full thermal internal lining through key body panels to provide maximum warmth retention in very cold water. Combined with GBS seams, it is Abysse's warmest and most protective wetsuit.
What seams does the 5/4mm use?
The Clark 5/4mm uses glued and blind-stitched (GBS) seams. GBS seams create a watertight seal that minimises water entry and maximises thermal retention during very cold water and extended winter sessions.
Does Clark feel restrictive in thicker versions?
Clark is designed to maintain comfort and mobility across all thicknesses. High-movement areas, shoulders and arms, remain flexible even in the 5/4mm.
How do I care for my Clark wetsuit?
Rinse with fresh water after every session. Dry away from direct sunlight. Close the Velcro tabs before storing to protect the lining and seams.
Is Clark suitable for activities other than surfing?
Yes, Clark is designed for surfing, SUP, kitesurfing, windsurfing, wakeboarding, foiling, open-water swimming, snorkelling, and scuba diving.
The Clark wetsuit is built with ECOPRENE, Abysse's material system combining premium Japanese neoprene with recycled fabrics.
- Yamamoto #39 limestone neoprene, sourced from calcium carbonate, not petroleum. Lighter, softer, and more heat-efficient than conventional neoprene.
- Recycled internal lining made from post-consumer plastic bottles, outer and inner fabrics.
- GBS seams on the 5/4mm, providing maximum water resistance for very cold conditions.
- Full thermal lining through key body panels for maximum warmth retention.
- Built for long-term durability, fewer replacements means less waste over time.
Abysse is Plastic Neutral certified through CleanHub. We remove ocean-bound plastic for every product sold.
• Free shipping $100+
• Easy returns for store credit
• Size exchanges available
• Fit support from our team
• Flat-rate worldwide shipping
see See full shipping & returns policy here
• Plastic Neutral with CleanHub
• We remove ocean-bound plastic for every product sold
• Reducing our material footprint
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