Aqua Lung 5mm Thermocline Zip Gloves The glove is made of 5mm regular neoprene. The gusset is 2mm neoprene and glued/blind stitched to minimize water exchange. The finger seams are triple glued and blind stitched to reduce water exchange. The Zipper is a #5 plastic YKK zipper to prevent corrosion. Hook and loop tab holds the zipper puller in place and protects the slider.