In-mold composite skeleton increases structural integrity and allows a greater variation of vent shape and size.Headmaster II - Intuitive one-handed fit system adjustable by height and circumference with premier look and feel.AgION fit pads - Moisture wicking antimicrobial pads eliminate odours completely and naturally.LockDown strap dividers - Helmet strap management made simple: flip open to adjust, flip closed to secure.Internal, recessed channels manage airflow through the helmet and over the head.Unconditional Bontrager Guarantee.Crash Replacement Guarantee - Free replacement if your helmet is involved in a crash during the first year of ownership