Dry-suits open up an entirely new world of diving, from Antarctic glaciers to Lake Michigan shipwrecks to extended duration deep dives. They are a popular option for technical and professional divers who must endure conditions that recreational divers would normally not encounter. Dry-suits function by inflating air into the suit from the inflator hose, creating a sealed pocket of air around the diver. Divers looking to go into harsh environments like shipwrecks and caves must consider the durability of dry-suit material (tears and rips will compromise the seal and dryness) and must be able to control their buoyancy with the added layer of their suit. Dry-suit users must complete a dry-suit certification course, which we offer for free with every dry-suit purchased from us.