Fins Scuba and snorkel fins are your motor. Some environments and situations require more horsepower, some require torque. In the following pages, you'll find all sorts of fin styles and colors. There are open heel adjustable, which require booties and have a strap around the heel to hold your foot in the fin pocket. There are also full foot fins that are used in warmer waters for freediving and snorkeling and for scuba diving in warmer waters. We've tried out all of these fins at one time or another and can help you make a decision if you're not clear on what you need.