Product Details Brand： ROCKBROS Name: Ski Helmet Gender: Unisex Size: L(58-61cm)/XL(61-63cm) Colour: White Red Weight: about 370 grams Material: PC Exterior: PC Inside: EPS EPS, PU foam Adjustment strap: nylon Functional features REMOVABLE EAR MUFFS: The ski helmet comes with removable ear muffs to provide you with more warmth. SKI GOGGLE BUCKLE: There is a buckle on the back of the ski helmet for attaching ski goggles or headband. Adjustment knob: There is an adjustment knob on the back of the helmet that allows you to adjust the position according to your head circumference. Comfort and Breathability: There are 11 ventilation holes on the top of the helmet and the lining is made of soft fleece to provide you with extra warmth and comfort. The right way to choose your size Remove the cord and measure from the roots of the hair, cross the head to 2cm below the test point and make the first loop, leaving 1-2cm ear width, including the hair. Measure the length of the cord at the end.