HEAD Tarpon 2/ Barracuda Dry/ Volo One Snorkel Setfeatures dual lens, silicone mask and dry top snorkel with silicone Comfort Bite mouthpiece. Fits most adult faces. Volo One fins are adjustable and comfortable with bare foot use. Packaged in travel and environment friendly backpack. Offered three sizes that fit most adults/teens. Small/Medium fits shoe size US 3 1/2 - 6 Medium/Large fits shoe size US 6 1/2 - 9 Large/X-Large fits shoe size US 9 1/2 - 12