Endura's FS260-Pro Bib Knickers DS are made of a durable stretch SPF 50+ fabric that provides excellent muscle support and fast quick wicking. They also have warm, double-layer knee panels. These knickers feature a seamless, multi-panel anatomic bib construction with a mesh upper, along with silicone grippers for an awesome fit. The unique drop-seat zipped construction on the thighs allows access for comfort breaks on the move. Plus, you'll love Endura's 600-Series antibacterial Silver Dry multi-density stretch chamois, which offers the ultimate in comfort and protection.