2.5mm Finemesh super stretchy neoprene peaked / visor surf cap - hat - hood. Velcro strap fixing for an easy fit. Made from highest quality SCR smooth skin neoprene (really warm). Double glued and blind stitched with VELCRO side closure for easy on and off (plus adjustable tightness of fitting). Most your body heat is loss via your head - not anymore with one of these caps. As worn by our sponsored rider, Rich Smith, UK and WORLD Knee board surf champion. Easy to use with velcro side closure - these caps REALLY KEEP YOU WARM !!