Swim Training Aid Pull Buoy for Upper Body Strength and Aquatic Water Exercise &ndash; Swimming Pool Equipment Foam Pull Buoy by Swim Research (Adult & Junior Sizing) Pull buoys help develop upper body strength and provides proper alignment in the water during swim workouts Placed between the thighs to elevate the legs and neutralize natural kicking motions Soft, comfortable closed cell EVA foam Color: Blue/Yellow Available sizes: Adult (9.25"L x 4"W x 6"H inches), Junior (8.5"L x 3.5"W x 5"H inches)