The Scuba Pro Delta Boots are a Versatile Rubber Sole Comfy Ankle High Boot for Warmer Waters Diving and Water Sports. The Delta is a Slips On-and-Off Design without Zippers. Boot is made from 5 mm Nylon ll Neoprene which will keep your feet Toasty Warm in Warm Water Conditions. The Delta Boot has Glued-and-Sewn Seams for Strength and Durability with Elastic Taped Sewn Top for additional Strength and Easy Donning. Covered by a 12 month Scubapro limited warranty.