GMAX GM68S Max Men's Snow Racing Snowmobile Helmet - Yellow/Silver/White / Medium

19 Vents for "state of the art venting" (9 intake and 10 exhaust) High airflow top intake vents feature larger controls for easy use with gloved hands Interior designed to assist shell and styro venting by not blocking the vent holes and channels Lightweight, multiple shells and styro's for GMAX premium fit and maximum comfort D.O.T. Approved, lightweight thermoplastic poly alloy shell L.E.D. Light on rear of helmet is incorporated into the rear vent. It is unobtrusive with different easy to use light settings and choice of red or black lens that are included New outer flip tint lens New state of the art anti-fog double lens shield with anti-scratch hard coated outer lens for a longer lasting clear view Comfortable, unobstructed snow breath guard reduces fogging Snow chin curtain for added warmth and reduced noise Large eye port for improved range of vision. Molded front air deflector directs hot breath away from shield to reduce fogging 2009 Model Sizing Note: XS - Hat Size: 6 3/4 - Centimeter: 54 - 55 - Inches: 21 1/4 - 21 5/8 Sm - Hat Size: 7 - 7 1/8 - Centimeter: 56 - 57 - Inches: 22 - 22 7/16 Med - Hat Size: 7 1/4 - 7 3/8 - Centimeter: 58 - 59 - Inches: 22 13/16 - 23 1/4 Lg - Hat Size: 23 5/8 - 24 - Centimeter: 60 - 61 - Inches: 23 5/8 - 24 XL - Hat Size: 7 3/4 - 7 7/8 - Centimeter: 62 - 63 - Inches: 24 3/8 - 24 13/16 2XL - Hat Size: 8 - 8 1/8 - Centimeter: 64 - 65 - Inches: 25 3/16 - 25 5/8 3XL - Hat Size: 8 1/4 - 8 3/8 - Centimeter: 66 - 67 - Inches: 26 - 26 3/8