ZONE3 Women's Yulex® Sleeveless Swimsuit

The Women's Yulex Sleeveless Swimsuit is a 1.5mm swimsuit in plant-based natural rubber, for open-water swimmers who want warmth through the core and a stroke that moves exactly as it always has. Yulex comes from the Hevea tree rather than from oil, and Zone3 was the first triathlon brand to use it. Wear it over swimwear while the water is still mild, then as a base layer under a wetsuit once it drops. Surfing and paddleboarding are covered too.

WHO IT'S FOR

You swim outdoors into the autumn and the cold you notice first is across your middle, not your arms. A full wetsuit is more suit than early-season water asks for, and a standard costume gives you nothing at all. This sits between the two.

Open-water swimming as the water cools
Cold pools, lidos and unheated outdoor water
Surfing and paddleboarding
Layering under a wetsuit once the water drops further

WHERE IT SITS IN THE RANGE

This is the least covered of the women's Yulex swimsuits and the only one that leaves the shoulders alone. The Women's Yulex Long Sleeve Swimsuit runs the same 1.5mm rubber down the arms, and the Women's Yulex Kneeskin extends it over the thighs. For a thermal layer without rubber, the Ti+ swimsuits use a titanium-infused lining instead.

KEY BENEFITS

1. Your core stays warm as the water cools. 1.5mm Yulex is a closed-cell foam that absorbs very little water, so the warmth you have at the start of a swim is the warmth you still have at the end of it.

2. Your shoulders move as though you were wearing nothing. The sleeveless cut leaves the whole shoulder and arm bare, so catch, reach and rotation stay exactly as they are in a standard costume.

3. One suit covers the whole of the cooler season. Wear it over swimwear while the water is still mild, then as a base layer under a wetsuit once it drops further.

4. The warmth of neoprene, grown rather than made. Yulex is a natural rubber tapped from the Hevea tree and refined into a foam. Yulex says its plant-based rubber foam emits 80% less CO2 than petroleum-based neoprene. The linings are recycled polyester.

5. Nothing rubs on a long swim. Low-profile flatlock seams sit flat against the skin, the leg openings are finished with a zigzag stitch that holds without gripping, and the lower body is cut for more coverage than a costume gives.

WHAT YOU'LL FEEL

Cold water still finds your arms. What changes is everything underneath them. The first minute is the usual argument with the temperature, and then your middle settles and stays settled while the rest of you gets on with the swim. Reach forward and there is nothing pulling at the shoulder, which is the part people expect to lose and do not. Getting out is where you notice it most, standing on the bank warmer than the people you came in with.

Features

MATERIAL

1.5mm Yulex natural rubber: plant-based closed-cell foam tapped from the Hevea tree, with minimal water absorption so warmth holds through a swim.
Recycled polyester linings: soft against the skin inside, durable outside.

WARMTH AND COVERAGE

Sleeveless cut: core warmth with the shoulders and arms completely free.
Extended lower-body coverage: more coverage through the hips and upper legs than a standard costume gives.
Layering: worn over swimwear in milder water, or as a base layer under a wetsuit when it drops.

FIT AND CONSTRUCTION

Long front zip: full-length front entry, so the suit goes on and comes off without help.
Low-profile flatlock seams: stitched flat so the seam sits against the skin rather than under it.
Zigzag-stitch leg openings: a stretch-finished hem that holds position without digging in.

ZONE3 Women's Yulex® Sleeveless Swimsuit