As the true "rain bootie" int Castelli's overshoe line-up, the Pioggeralla Shoe Cover has been designed for such drizzle, light or even for heavier rain, with good water and wind protection, but without additional insulation. It is intended for spring or autumn days with wet roads or light rain, or even for cool weather without the risk of rain when the blocking aspect of the waterproof PU-coated stretch fabric sheds the wind easily, preventing cold air penetration. This is not your go-to overshoe for extreme cold, but you'll be surprised how perfect it is for many of your rides. It has sealed seams, a waterproof zipper, and a silicone-sealed hem to prevent water from seeping in, while the high elasticity also gives it a snug, comfortable, and aerodynamic fit. The zipper has an asymmetric design that works exceptionally well, starting at the heel instep and moving up and across the back of your lower leg up to the cuff.