Castelli team sky belgian bootieteam sky will be the only worldtour outfit wearing castelli clothing such as these belgian booties and will race and train in the brands kit better protection and easy cleaningcastellis belgian booties are made of 100 polypropylene for increased durability and easy cleaning and feature a double layer knit on the foot part for better protection the cut on these booties is high enough to cover a 9cm sock and the silver bands around the ankle are made with reflec