Open Heel Fins: Rubberized side ribs improve elasticity and stability. Channel Thrust Technology system for optimal water channeling. Maintaining optimal thrust throughout every phase of the fining stroke minimizes fatigue. Upper and lower stabilizers help transfer energy from foot pocket to the blade. Soft rubber foot pocket, with ribbed insole for an improved fit and a dramatically more efficient fin stroke. Quick-release fin buckles. Men's Size (Shoes): S/M(5-7), M/L(8-10), L/XL(11-13). Women's Size (Shoes): S/M(6-8), M/L(9-11), L/XL(12-14). Diving Boots: Thickness: 5mm zipper & zipper guard. Toe & heel caps. Black rubber sole. Excellent traction. Scuba Mask: Ideal for medium faces (fits almost everyone) -face seal size W4 1/2 * H3 3/8. Crystal, liquid silicone injected skirt and strap. Double edge comfort seal. Ultra low volume. Broad peripheral view. Tempered glasses. Whistle Snorkel: Elliptical open top and contoured barrel reduces water resistance. Quick slip-in snorkel keeper. Flexible silicone corrugated lower section. Soft silicone mouthpiece prevents jaw fatigue. Silicone purge valve for easy draining. Mesh Drawstring Bag: Nylon mesh bag with cord drawstring closure. Designed for one set of snorkeling gear and more.