Replacement Tubing Set For BC4200 Relaxation Sound Systems * Black neoprene provides warmth Oxygen Masks * Black neoprene provides warmth flexibility and support * Easy application * Excellent adjustability * Measurement is around kneecap * Latex Free * Comes with 1 adjustable velcro strap on top portion (above kneecap) Medium: Mens 7 8 Womens 8 9 * Embodies nearly perfect 4 season post operative protection with a closed toe design that keeps dressings and toes warm and dry * Unparalleled versatility by accommodating both bulky dressings & most fiberglass casts * Rocker sole * Square toe design acts as a bumper to protect the toes * Ankle strap seats foot firmly in shoe to reduce heel slippage and eliminate friction * Removable forefoot closure * Zoned outsole has an aggressive tread under the mid foot where traction is needed most * Removable Insole features twice the padding of standard insoles and can be modified as needed