Castelli Women's Cycling Base Layers & Bras - What makes a cycling bra? Most sports bras concentrate on support and eliminating bounce. Cycling is a very low impact sport most women don't need excessive support on the bike - whats required is gentle support breathability and a touch of modesty. Castelli Cycling Bras are designed to gently support your bust while working like a base layer wicking away moisture and offering maximum breathability. The subtle design also hides under your jersey. Our ladies base layers further help wick away moisture helping to regulate temperature and comfort in all weather conditions. During the winter months you can also find women's thermal base layers in this section. Buy your Castelli Women's Cycling Base Layers & Bras today from Castelli Cafe for a more comfortable ridding experience.