The Fox Baseframe Pro Sleeveless base layer provides moisture management, cooling, and protection in a single low-profile unit. Designed to be worn under your jersey, it offers protection for both men and women, providing EN1621-1 Level 1 back protection. Hip pads provide additional comfort and protection. The base layer features a moisture-wicking, open stretch mesh for breathability and built-in padding at the hips. The D3O back insert is removable for easy washing and provides world-leading impact protection technology. The base layer is made from a combination of materials, including 35% PU, 37% nylon, 8% polyester, and 20% Eva.