Wetsuit construction explained

Seams and stitching

Wetsuits are hand-sewn from individual rubber panels. The seams hold everything together — and they're the main weak point for water entry. Three seam types dominate.

Overlock stitch — the cheapest option. A basic stitch that goes all the way through both panels. Rigid, leaky, and causes chafing. Found on rental suits and budget children's wetsuits. If you see overlock stitching on a fullsuit, it's a budget suit.

Flatlock stitch — a zigzag stitch joining diagonally-cut panels. Strong, flexible, and causes minimal rash. But the stitch holes go all the way through, letting water in. Used on shorties and warm-water suits where some water entry is acceptable.

Blindstitched seams (GBS) — glued and blindstitched. Panels are first glued together, then stitched with a curved needle that only penetrates halfway through the rubber. Water can't enter through the stitch holes because they don't go all the way through. The standard on mid-range and above fullsuits.

Sealing and taping

GBS seams can be further waterproofed. Taping involves heat-welding neoprene tape over seams on the inside of the suit. Full taping covers every seam; spot taping covers only the critical high-flush areas (chest, back, shoulders) to save weight and cost. Liquid sealing applies silicone or rubber over the external seams for a fully waterproof finish. Essential in cold water.

Glue

Panels are glued before stitching. Traditional glues are solvent-based (petroleum). The industry is shifting to water-based alternatives like aqua-a glue, which eliminates volatile organic compounds. If sustainability matters to you, check what glue a brand uses — it's rarely mentioned in marketing but makes a real environmental difference.

Entry systems (zips)

Back zip — a long vertical zip down the spine. Easiest to get in and out of. A batwing (neoprene bib) inside blocks water from reaching your skin through the zip. Common on entry-level and warm-water suits. The long zip can let more water flush through, especially during duck dives.

Chest zip — a shorter zip running horizontally across the chest, attached at one shoulder. Less water entry than a back zip. Provides better freedom of movement across the back panel. Slightly harder to get in and out of. The most popular choice on mid-to-premium suits.

Zipperless — no zip at all. You pull the suit on through a wide neck opening that seals with a flap. Minimum water entry, maximum flexibility. The downside: getting in and out is a workout, and the closure points are under more stress. Not for everyone.

U-zip / hybrid zip — a zip that follows a U-shaped path around the shoulders, combining elements of chest and back zip designs. Relatively new, popularised by Vissla x Axxe Classic.

Most zippers in wetsuits come from YKK, the Japanese manufacturer that supplies the global industry.

Panels and paneling

A standard wetsuit uses 15 to 30 individual panels of rubber, cut and stitched together. Fewer panels means fewer seams (and fewer potential leak points), but requires stretchier, more premium rubber to maintain mobility. The Quiksilver Highline Pro uses as few as 5 panels — but costs over 700 euros.

Other features worth knowing

Knee pads — reinforced patches on the knees, made from Supratex or similar composites. One of the first areas to wear through without them.

Cuffing — the seal treatment at wrist and ankle openings. Ranges from a basic cut edge to silicone grip strips or glideskin panels. Better cuffing is one of the clearest differences between budget and premium suits.

Neck seal — elastic adjusters, silicone grip patterns, and glideskin combine to minimise water flushing at the collar. More important on chest-zip and zipless suits.

Drain holes — small holes at the ankles, lower back, or zip panel that let water drain out. Common on kitesurf and windsurf wetsuits.

Key pocket — a small sealed pocket for your car key, usually on the inner thigh or calf. Simple but essential.

Gusset — an extra panel in the armpit that increases paddling range of motion. Since 90% of surfing is paddling, this matters more than most features brands market.