This generously sized Scubapro SMB (surface marker buoy) is also compact, folding into a small package for easy stowing while diving. It deploys quickly once you reach the surface and its 6 foot/4.5 foot height and attractive orange/yellow colour make it easily spottable by captains and buddies This Scubapro SMB is made of rugged 210D nylon with HF welded seams, the bottom is sealed and a metal inflator and exhaust valve are included, so you can choose how to inflate it. LPI, oral or 2nd stage inflation can be used to inflate this highly visible SMB. There's a large (5cm) stainless D-ring and bungee loop on the lower end, with a plastic D-ring on top for a flashlight.