Some bags are available with a twist lock tube valve.This valve is attached to a piece of tubing. With this valve the bag can easily and quickly be inflated and deflated. Optiparts buoyancy bag. Normal valve, Color white size inflated 29 cm x 92 cm, According to IOD95 rules.
Heavy duty polyurethane coated nylon buoyancy bag. Bags made of polyurethane coated nylon are about half the weight and significantly stronger than bags made of PVC or PVC coated nylon.