3mm thick (roughly) Neoprene - provides great protection and shock absorption for your Camera lenses. | This camera lens pouches are made of neoprene, the same material used to protect scuba divers from tharsh sea. | This neoprene lens pouch is very soft and elastic, but durable to hold and protect your lens. | Belt Loop - allows you attaching the pouch to your belt, for convenient travel carrying. | Hook - allows you attach the pouch to travel anywhere with a ring (such as camera bags and backpacks).