Adult/Kids short fins snorkeling swimming diving training flippers, Portable duck feet or frog shoes fins swimming trainer. Ultra comfortable liner, specifically for use without shoes. Soft, extremely comfortable and designed for the bare foot. It lightweight, compact and it fits In a luggage or a backpack. Our swim fins have excellent flexibility to help prevent cramps and fatigue. Perfect for snorkel and swim. Designed for pool use and swim training, but can also be used adequately for recreational swimming and snorkeling.