Mavic hot ride sl base layermavic hot ride sl tee is their lightest seamless sleeveless base layer designed for riding in hot temperatures the idea of wearing a base layer in the heat seems counter intuitive to a lot of cyclists that is until you try a good one mavics base layers are made from 37 5 fabric which contains active particles that respond to your bodys temperature working harder to absorb heat and wicking away sweat five times faster than polyester the effect is a perfectly