Sopras Sub FreeDiver Buoy Instructor Float Training Buoy Scuba Diver Freediving Snorkeling FREE Extra Flag with Stiffener Florida legal size Inside bladder in Nylon 200D and is H.F. welded therefore is extremely light weight (only 1.2kgs Excellent for Instructors , FreeDiving, Beach Diving - Comes With Flag SS ring on the bottom and around the buoy Net on the bottom for water drainage - Large opening on the top Free Extra Dive Flag with Stiffener ( Florida Legal Size for Floats )