Puriguard diving Jumpsuit 1.5 mm IST signature jumpsuits, constructed of high-grade neoprene in 1.5 mm thickness options. 1.5 mm suit Flat-lock Stitching suits. Double Blind Stitching. Special printing technique on shoulders and chest areas offers extra durability in areas prone to high wear when diving with BCD. YKK #5 zipper at wrists and ankles. Puriguard Fabric.