Trunch Waterproof All Weather Cycle Cap

The SealSkinz Trunch Cap solves the usual waterproof-versus-breathable tradeoff with a three-layer build: an 80/20 polyester-nylon outer, a membrane-level Aquasealz layer that blocks water while still venting heat, and a wicking polyester lining against the scalp. A raised peak and a Coolmax sweatband split the moisture-management job, one handling rain runoff, the other handling sweat, so neither compromises the other. The low-profile fit is cut specifically to disappear under a helmet shell.

What Our Gearhead® Experts Are Saying:

"I've run plenty of waterproof caps that turn into a sauna the second the effort ramps up, but this one vents heat through the membrane instead of trapping it against my scalp. It's the first wet-weather cap I've stopped thinking about mid-ride."