CE4Y 2 mm Neo Cap – Protection Against Brain Freeze The CE4Y Neo Cap is designed specifically for canyoning and is worn comfortably under your helmet. The 2 mm neoprene combined with a soft plush lining keeps your head warm and helps prevent brain freeze when jumping into cold water. The cap with the slim design fits perfectly under the helmet without adding bulk – for maximum comfort and safety. Features 2 mm neoprene – ideal for cold water Warm plush lining for superior comfort Low-profile, helmet-compatible design Perfect for canyoning, rafting & whitewater sports Size Guide: S/M: head circumference 50–56 cm L/XL: head circumference 55–62 cm Please be aware - this product is product only and does not include any branded packaging.