These thermal bib tights are made of Italian tech performance thermal fabric with a brushed interior that effectively keeps you warm and a DWR treated water repellent surface to keep you warm and dry during winter rides, a lighter fabric combination on the back of the abdomen to provide more breathability, and U-shaped elastic bibs straps that go around the chest reduces pressure around the area. Two pockets on the side of the legs provide convenient storage for energy bars, chocolate, wallets and other carry-on items. The front and back panels are made of high-stretch Lycra thermal fabric that is soft and skin-friendly. The ultra-thin, extra-wide silicone leg clips further stabilize the legs, distributing pressure evenly across the legs to avoid restriction, and provide sufficient compression for high-intensity exercises and reduce lactic acid buildup after long-duration rides. The ergonomic CurveTec ™️ powered pro fit provides good support and 4D wrap for women's lumbar muscles. The quality flat stitching prevents friction and eliminates distraction during a ride.