Description: 【Comprehensive Protection】: This sports ski helmet offers full protection with a switchable ventilation system. When open, it accelerates the intake of fresh air, and when closed, it locks in warmth for a comfortable and lightweight experience 【Quality Material】: The snow ski helmet is made of integrated PC anti collision hard shell material, paired with an PP cushioning layer for efficient shock absorption and impact resistance 【Adjustable Fit】: Equipped with a 3D stereo head circumference adjuster, the skateboard helmet can be adjusted to fit different head sizes perfectly, ensuring better adherence to the head 【Detachable Lining】: 12 ventilation holes sports helmet with comfort chin pad is designed with detachable soft and warm lining and earmuffs, quick release buckled, comfortable to wear 【Wide Applications】This winter snow ski helmet is widely suitable for outdoor sports skiing, skateboarding, roller skating, etc. Also a great gift choice for families and friends who love outdoor sports Specification: Material: PC PP Size Chart:M: Head Circumference 55 cm-58 cm/21.65 inch-22.83 inch Package Includes: 1 Ski Helmet Note: Please allow slightly errors due to manual measurement.