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 Y-shaped elastic bibs straps that go around the chest reduces pressure around the area. 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.