Double Knee Rec Pants. The Double Knee work pant has our iconic Dickies relaxed fit, made of our signature midweight twill now produced of consciously sourced recycled fibres. Reinforced at the knee, these twill pants are designed to be hardwearing and comfortable, offered in five fade resistant colors. The poly-cotton blend makes these a timeless work-inspired pant that’s built to last. Materials: RECYCLED 66 CLOTH, 65 % POLYESTER 35 % COTTON, 271 GSM.