1mm Titanium Neoprene Beanie. 1mm 250% SuperStretch Cap. 1mm 250% SuperStretch smooth skin face seal. Adustable velcro chin strap. 100% Titanium coating on entire cap. Titanium coating “reflects” warmth, increasing heat retention. Retains as much as a 2mm ~ 3mm thick fabric. Dries faster than standard neoprene as the Titanium lining naturally sheds water. Allows you to feel dry and warm, even after your second dive / swim. Watertight blindstitched throughout. Multiple vents that release air – prevents air bubbles from forming.