Abstract: A system for supporting and protecting wounds, incisions, transdermal procedural sites, and associated medical equipment from moisture and other contaminants is disclosed. The invention is an assembly of a waterproof outer cover, at least one water absorbent dam, and an equipment support sleeve deployable around a limb or extremity. The waterproof outer cover is a limp tube or sleeve with at least one waterproof closure providing an annular seal around a user's extremity. The water absorbent dam is detachably deployed just inside the seal around the extremity to absorb any moisture which breaches the seal during water exposure and to catch any retained moisture as the waterproof sleeve is removed. The support sleeve secures equipment to the extremity within the waterproof cover.