The Rocks fins is Cressi's answer to the price conscious parents who needs reliable snorkeling fins for their kids for vacation use. The Rocks are a composite-design, vented open heel fins with adjustable straps designed to follow the kid’s growth. The straps have the large-thumb-loop for easy donning and doffing. Dual composite vented blades provide excellent power and energy saving efficiency. All in all, these fins are great for family snorkel trips and will allow hours of underwater exploration.