The Flyweight Bib Shorts have been specifically designed for cycling and training in hot and humid conditions. With an 80% polyester and 20% elastane combination fabric, they are light and breathable, featuring a thin mesh upper section with a cut away at the front to keep you cool. The material offers a soft four-way stretch to allow for maximum movement, and they have been treated with Coldblack, which reduces the build-up of heat by reducing the amount of sunlight absorbed by the fabric.