Description:Adopts the large air vents that can improve air flowing and keep your head cool, and the high-performance inner pad that can improve comfort and perspiration performance, this helmet is comfortable to wear.4X DryLite web that is thin, soft and light will not be deformed by water or sweat, the strap system of this helmet that has 3 height adjustment types and elasticity adjustment improves wearing safety.The shell of this helmet is made of PC and its inner liner is made of EPC.There are the sizes of M(54-58cm), L(57-63cm) for you to choose.It is suitable for road bicycle, mountain bicycle and so on.Item Name: HelmetMaterial:PC,EPSSize:26cmx20cmx14cm/10.24inx7.87inx5.51inNotes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 X Riding Helmet