For all of the main body panels, Capo choose Power Lycra that offers mucho muscle compression and a support to help improve blood circulation and comfort during sport. beyond compression it wicks well for proper moisture management. all of these panels are treated with a Coldblack finish. This helps reduce the absorption of heat rays in darker fabrics through reflection. Perforated white, 4 way stretch upper give mucho support but will not saw into your clavicles when assuming the position on your bike. Capo's Anatomic-L HD Carbon EIT insert takes care of chamois duty and is both comfortable and ant-microbial. Thin silicone grippers keep the legs from riding up your thighs.