Outdoormaster Multi-Sport Scooter, Roller Skate, Inline Skating, And Product Details DURABLE - Built for both comfort and impact resistance with REINFORCED ABS SHELL THICKENED SHOCK-ABSORBING EPS CORE. EXTRA REMOVABLE LINING - Skateboard helmet with two removable liner for different head sizes and easy to wash the sweat away. A HELMET for MULTI-SPORT - Smooth Ventilation System helps to protect and enjoy SKATING, CYCLING, BMX, MTB and etc. DOUBLE ADJUSTMENT - Well-attached long-lasting adjustment dial and skin-friendly adjustable chin strap maxmize the best fit and comfortable wearing. HOW TO MEASURE A PROPER HELMET? - To find the right size bike helmet, start by measuring your head circumference, wrap a flexible tape measure around the largest portion of your head?about one inch above your eyebrows. Or, wrap a string around your head, then measure the length of string with a yardstick. Size Large is recommended if your size is between 21.3-22.8inch (54cm-58cm). Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.