Usongs Chic 22 Net Mesh Hole Vents Bike Cycling Bicycle Adult Safety Helmet Yellow With Adjustable Rotary Internal Regulator Material: Plastic And Foam Color: Yellow Hole: 22. Weight: 8.61 oz / 244 g Dimensions: 10.62 x 8.66 x 5.51 " / 27 x 22 x 14 cm ( L x W x H ) Package Includes: 1 x Helmet , with 1 usongs brand black elasticity sport hair band (towel material), 1 random color keychain retractable measuring tape.