Sturdy, high quality looking textiles quality. They're comfy and look really smart. The pockets are really well designed. I'm 6ft3, but I'm really skinny. The website recommended an XL, which fits length-wise perfectly, but it is a tiny bit loose around the waist. With a belt, it fits perfect. Climbed in them yesterday, and they held up really well. They're airy too, which is great, as it was a hot day.