5mm NeoSport Hi-Top Booties w/ Zipper Perfect for any watersport including SCUBA diving! The NeoSport Round Toe Booties feature an easy access side zipper, sealed seams to keep cold water from trickling in, an anatomic and pre-bent design for a molded fit, a durable traction sole, and a water entry barrier (WEB) to keep your feet warm and toasty. Manufactured by wetsuit legends, Henderson USA, you can be sure that this boot will perform for years to come. Sizing Tip: Choose your regular USA shoe size and round down if you're a half size. Example: Men's 9.5 should choose size 9Thickness Chart: *Water temperatures are only guidelines. Many variables such as water temperature, depth, duration, and personal water temperature tolerance will impact your comfort level. It never hurts to order a thicker boot3mm: Good for temps 60 degrees and up5mm: 50 degrees and up7mm: 40 degrees and up