The adjustable, short-bladed Trek Fins from Aqua Lung are easy to pack, lightweight, and great for traveling snorkelers. With an adjustable heel strap to fine tune the fit and a super-soft comfortable foot pocket, the fins do not cause the blisters and pain associated with so many swim fins (particularly the ones you rent.) The specially designed fin blade delivers an excellent snap in the water, and offers great power and styling that is suitable for multiple water sports including snorkeling, bodyboarding, and swimming.