Castelli Tempesta Waterproof Shoecovers; The Castelli Tempesta Waterproof Shoecovers offers a wind & waterproof barrier Castelli's OUTDRY fabric ensures a totally waterproof barrier but remains flexible enough to fit the majority of shoes Neoprene cuff for easy on/off & secure fit around the ankle Open bottom to work with all types of cleats Reflective print for additional visibility in low light conditions Castelli Sizing Guide