With the great success of the D3O shorts, we had a ton of requests for a long pant version. Not only do you get the high performing features of our D3O shorts but you also get the benefit of an extra warm, full length base layer, as well as added protection of built in knee pads. Our knee pads are made of a soft, dense foam that is pliable and very comfortable. They definitely take the bite out of falls and keep you knees from bruising after spending hours on the hill. In addition we added velcro straps behind the knee pads so you can adjust them according to your height and they'll stay in place all day! Enjoy the shred!