The castelli toe thingy has been designed for those slightly cooler days where you need to keep your toes warm but a full overshoe isn39t required or is too much hassle to quickly slip on over your shoes the toe thingy has been constructed using a super durable neoprene material for the best protection from the wind and rain and easily slips on over the front of your cycling shoe and is kept in place by the cleats the underside of this castelli overshoe is rugged and adds grip as well as o