I have a pair of the kuiu attack pants which I use for climbing with great results. They are super soft and stretchy but indestructably durable. I could scrape em up and down concrete and they'd be fine. They breathe very well, and don't limit movement at all. A little more expensive at $150, but you are paying for the durability of the product. Mine are over a year old, they get used on average about 4 times a week, and they are still in mint condition. I will have them for years to come.