The Castelli Endurance 3 Shorts combine Castelli’s pro-level Progetto X2 seat pad with a traditional cut to deliver lasting comfort on the longest rides.The Progetto X2 Air Seamless seat pad consists of two separate layers: a soft stretchy layer that sits next to your skin and prevents any rubbing, and a perforated cushioning layer with two separate density foams along with breathable perforated gel inserts. These layers work together to keep comfort levels at an all-time high, for the pro peloton and dedicated weekend rider alike.A pro-level seat pad demands a great fit, and that’s exactly what the Endurance 3 has. The anatomic cut holds the seat pad in just the right place and seams around the hip area create the perfect on-bike shape. The Endurance Evolution fabric provides optimum muscle support and feels dry when you’re riding in the heat of summer or even working up a sweat on the turbo.Key FeaturesEndurance Evolution fabric,Anatomic cut for perfect on-bike fit,Progetto X2 Air Seamless seat pad,Giro3 leg grippers,15° – 38°C / 59°– 100°F,Weight: 162g (Large).