Lightweight, breathable, stretchy. 88%nylon/12%spandex. Love these pants and they've served well with lots of use showing very little signs of wear and tear. These are a regular fit with generous measurements without being baggy. See images. Pointing out 2 small spots that I ripped on a sticker Bush or stick or something in the forest a few years ago. One I sewed up sort of not so prolike but it has not ripoed or frayed since doing so. The other spot is tiny and didn't run. Both are on the inner backside of the leg and are not noticeable when wearing them. The backside leg cuffs at the opening have some seemingly permanent road/mountain dirt on them from drag during hiking and bouldering. Kuhl just makes quality stuff. No degradation on the seat, inner thigh or crotch areas. Still great condition and look nice. If I hadn't dropped some waistline size for these to be too big to sit comfortably on my hips, I'd be keeping them. These are durable and comfortable and a go-to for venturing out for an active day exploring or running with the dog. Thanks for looking!