This patent pending hoof protector boot kit belongs in every horse owners supplies. This boot features easy on; easy off, a double pad system including a felt insert (that can be used for hoof soaking ointments) and a foam memory pad (which is referred to as a Founder Pad for foot comfort). It is light weight enough to keep on hand during trail rides and durable enough for light turn out. They are machine washable and have a writable tag with a place for horse/owner information. For fitting, measure diagonally from corner of the heel to corner of the toe. Round up your measurement. XS (3 3/4), S (4 1/2), M (4 3/4), L (5 1/2), XL (6), XXL (7). Sold singly.