Features： 1、Multiple large breathable ventilations holes, breathable and sweat wicking, comfortable to wear. 2、Detachable lining for easy cleaning, reducing sweat and odor, and maintaining cleanliness and comfort. 3、There is an adjustment knob on the back of the helmet to help adjust the headcircumference. 4、Made of fine quality ABS+EPS, wear-resistant and comfortable. 5、Overall lightweight, wearing without pressure. 6、Multiple sizes available, suitable for both children and adults. Specification： This helmet is for both children and adults. This helmet is designed with superior protections and comfort in mind. It features a wear resistant outer layer for maximum impact resistance, and an adjustable belt for a safer and comfortable fit. The breathable holes ensures optimal ventilations, keeping you cool and drying during activities. Whether you're Cycle, skateboarding, or engaging in other outdoor sports, this helmet provides the essential safety you need. Features: Multiple large breathable ventilations holes, breathable and sweat wicking, comfortable to wear. Detachable lining for easy cleaning, reducing sweat and odor, and maintaining cleanliness and comfort. There is an adjustment knob on the back of the helmet to help adjust the headcircumference. Made of fine quality ABS+EPS, wear-resistant and comfortable. Overall lightweight, wearing without pressure. Multiple sizes available, suitable for both children and adults. Specifications: Color: black, white, blue, pink, red (optional) Size: S (470-530mm), M (540-600mm), L (580-620mm) (optional) Material: ABS+EPS+sponge Package size: 280 * 200 * 200mm / 11.0 * 7.9 * 7.9in Package weight: S: 325g / 11.5ounce M: 340g / 12.0ounce L: 355g / 12.5ounce Packing List: 1 * Helmet Package List： 1 * Helmet