The Santini Men's Photon 2. 0 Bib Shorts blend aerodynamic design, supportive compression, and exceptional breathability worthy of the longest races and warmest training rides. The main body is constructed from Thunderbike, a Power Lycra fabric that provides fatigue fighting support for your muscles. The fiber strength and knit of Thunderbike also happen to give the shorts a heightened level of resistance to abrasion and durability. In addition to its supportive characteristics, Santini chose Thunderbike for its highly breathable and fast drying capabilities to deliver the ideal mix of support and temperature control. At the leg hems, laser cut edging and seamless elastic provide a secure, supportive, and aerodynamic interface to hold the shorts firmly yet comfortably in place. Santini also knows that the best designed bibs aren't worth a single thread without a stellar chamois, so it adds a Fondello C3 chamois. This multi density chamois boasts an ergonomic 3D surface for impeccable comfort, even after hours in the saddle.