The Hayabusa T3 boxing and MMA helmet is in a class of its own with an improved design that offers maximum protection without unnecessary bulk. Its compact design offers full protection without sacrificing an ultra-wide field of vision. The patented two-strap closure system on the back provides a customizable and secure fit that minimizes shifting so you can focus on your workout. Features: full coverage face protection compact design looks elegant and light patented T-Cross® closure provides a customizable fit multi-layer foam composition technology virtually indestructible Vylar® outer material open top and mesh ear covers vent heat to keep you cool the very soft inner lining is smooth and comfortable Size table: Size Head circumference M 51 - 58 cm L 58 - 66 cm