No one likes cold feet- whether youre about to get married...or about to paddle out on that frosty winter day. Keep those tootsies toasty with a pair of these babies and never have to finish your session with ice blocks for feet! Featuring water-resistant blind stitching, Velcro/elastic strap to seal out water, and small Velcro tab to attach the booties to your fins. Keep in mind, the 3mm will add about 2 shoe sizes to your feet, and the 5mm about 2.5 shoe sizes, so you may need larger fins to fit over them. Sizes: X-Small fits 3-5 Small - fits shoe size 6-7 Medium - fits shoe size 8-9 Large - fits shoe size 9-10.5 XL - fits shoe size 11-13