First off I purchased the x/xl, other people might disagree, but I never thought of myself having a big head and this barely fits and doesn't cover my ears. Does it work? Yes, but for me the cost/benefit ratio just isn't there, given what I had been doing for years worked ok, an outdoor research fleece with infenium skull cap. Did my head get wet, yep, so this will help. I'm just cheap. And normally I'm not caught out for more than 1. 5 hrs in the rain. This could be an unfair review, so a thumbs down might not be unwarranted.

Keeps the head dry and in a comfortable temperature

This is far more than a rain cap. It keeps your ears and head warm when it’s chilly outside, even on dry days, and it’s nice and thin (not bulky under your helmet like some caps). Also, this definitely should be advertised as unisex. It works/fits perfectly well on a man’s head. Good product.