Easy solution to prevent and treat pressure sores Veterinarian Approved No pressure on tendons 5mm neoprene, lycra lining Prevent re-injury One size fits most Easy Care...brush or hose off...hang in shade to dry. NEW DESIGN, As of one year ago we have changed the velcro strap width from 2 " to 1.5", this change has eliminated any chance of rubbing, as seen in the review below. *Equipro also offers this boot with a sheep skin lining for a premium comfort feel!