Sigvaris Comprefit - Strap Extender provides up to 4 inches of additional length to Comprefit and Compreflex compression wraps. It is ideal for people with larger calves or swollen legs and ankles. The strap extender fastens to the wrap using velcro for a secure fit. Each package contains one set of extenders. One set extends one strap. This product is latex free and machine washable.