it includes both 1mm and 3mm spacers matched to your BB's outer diameter for a refined

breathable fabrics

Combined with an updated fit

aerodynamics

4203 lightweight socks white Size:L it includes both 1mm andThe Lightweight Socks are made for hot summer weather. Knitted in a mesh structure for optimal breathability during the warmest days. Made with Q Skin yarn, featuring inherent silver microparticles to inhibit the growth of bacteria and reduce unpleasant odors. A nylon reinforcement on the heel and toe gives the mesh the needed durability. A sock providing excellent comfort and exceptional durability under the highest performance requirements. The l