It is made of black PC+EPS in mold technique
Size: 543-59cm（for kids and adults）
light weight and comfortable for wearing.
Suitable for skating, skateboard, cycling and other sports，wearing to protect your head from hitting.
Air Vents: 24
Unisize: 54-59cm, adjustable
Material: PC+EPS in mold technique ，With adjustment rubber knob,nylon chin strap and ITW buckle,headkey headring.