The Aqua Lung Heat 5mm Gloves are a pair of both tough, warm & flexible gloves. Closed cell neoprene with Titanium Slick Skin that covers the inside of the palm which gives you dexterity & warmth in the water unlike traditional lined gloves. The outside of the palm is tough, lined with a laminated woven nylon for grip & abrasion resistance. Warm For a 5mm glove the build & materials of the Heat glove make it very warm in the water. Closed Cell Neoprene has gas-filled microbubbles keeps water out & warmth in. Dry Seam Construction all over the glove means that water won't seep through the seams which are both blind stitched & glued. Tough The palm & fingertips are Laminated Woven Nylon which grips while still being tough when dealing with sharp objects. Glued Stitching means even if a section of stitching is cut it won't spread any further as the glue will hold it from unravelling. Inside the glove is Titanium Slick Skin similar to Glideskin which is smooth & tactile so get get better dexterity & purchase so the glove moves more naturally when worn. Specifications Use a soft measuring tape to measure the circumference of the dominant hand around the knuckles. Measure from the wrist crease to the tip of the middle finger to find hand length. Size Chart Size Palm Circumference Hand Length SM 7.75"-8" 6.75"-7.25" MED 8"-8.5" 7.25"-7.5" LAR 8.5"-8.75" 7.5"-7.75" XL 8.75"-9.25" 7.75"-8.25" ABOUT Aqua Lung Aqualung have been industry leaders producing a range of diving equipment from regulators & computers to drysuits, wetsuits & masks. Aqualung have been producing dive equipment since 1943, started by Jacques-Yves Cousteau & Émile Gagnan who introduced the world to scuba diving & the Aqua-Lung.