The ELB Boot by Cavallo is an Entry Level Boot (ELB) perfect for those still nervous about transitioning into being "barefoot and booted" and those who are already barefoot but require protection only on limited occasions. Also ideal for rehabilitation and therapeutic purposes; makes an excellent "spare tire" for a lost shoe.... (read more) Uncompromising in quality and specification. Upper material is Cavallo's 1680 count Denier industrial grade nylon the same material used on Cavallo Sport style hoof boots, which have been tried and tested in all terrains since 2008. Replaceable hook & loop fastener closure extends boot's working life in the event of hook & loop fastener fatigue. Easily fastened by 8 and 80 year-olds alike, the strap does not require a screwdriver, extra physical strength or any other tools. Features unique, built-in side drainage slots (not drain holes, which clog up). Single boot.