Helmet Sizing Senior Small- 20.5"-22" Senior Medium- 22"-23.5" Senior Large- 23"-24.5" Clip adjustment on the sides of the helmet Slide Clip Up, Pull Open Or Close Helmet To Adjust A recreational level hockey helmet suitable for all ages, with all the features you want and need at a very accessible price point. The Tacks 70 offers a modern redesigned shell that protects while keeping your style in line with today’s pro hockey players. DUAL DENSITY LINER - Lightweight construction with full coverage dual density foam liner for top notch comfort and protection suitable for all ages. Ventilated shell to help keep your head cool during play. TOOL FREE LENGTH ADJUSTMENT - Easy Flip Clip adjustment on the side of the helmet for a customized fit and high-level of comfort. HIGH DENSITY PE SHELL WITH INTEGRATED EAR COVERS - Modern, pro-approved look designed to help distribute recreational level impacts Certifications- HECC, CSA