Full arm MD. 27 L * Excellent retail packaging - Sells itself * The XeroSox Pro Pump is the only leg and arm protector with the patented watertight vacuum seal * The XeroSox fits snugly yet comfortably during a shower bath and even an active swim * Unlike modified garbage bag products the Xerosox cannot slip off and leak. You can\'t even pull it off * The Xerosox is rugged and made of high quality surgical latex * Special non-skid-grid helps prevent slipping * The built in Pro-Pump also acts as a gauge showing that the vacuum is intact and cannot leak * Pumps the air out