The Tough-1 Cooling Ice Boot is a fast and easy way to apply cold therapy to your horse.  It easily fits on lower leg or over hock and includes 4 quick-grip straps that allow you to apply as much compression to the leg as you want.  It stays soft when frozen allowing it to conform to the horse's leg. Great for treating arthritic joints, soft tissue, tendons and ligaments.  For best results keep in freezer between uses. Sold as one individual boot. 
Fits entire lower leg on the front or over the hock in the hind
Details:

Heavy-duty denier nylon shell will hold up to some of the toughest horses
Unlike ice, Tough-1 Ice Boot is malleable when frozen which allows for a close fit 
Four straps allows for even compression over the leg
Firm style, Ice freezes sold 

Sold as a single boot