Safety is very important when you are on the street. especially if you have to go to your destination by bike. choose this colourfull helmet to travel safely, yet stylishly. the helmet is comfortable and adjustable, so do not worry about the size. it has 11 ventilation openings and has a red light at the rear which blinks at 3 different speeds.features- more fun than a normal helmet- comfortable, lightweight and adjustable- fits almost all children- 11 ventilation openings- red rear light- lifetime (light): 10 hours (5 hours constant, 10 hours flashing)- 3 modes - runs on 2 ag3 cell batteries - safety tested to european standard, en1078- size: medium 53 - 58 cmproduct information - product: mini hornit lids bike helmet for kids - unicorn (m)- material: abs & ebs plastic, cotton, polyester- dimensions: l 24 x w 22 x h 17 cm - weight: 365 grams- colour: pink, multicolour- packaging: header card- packaging dimensions: l 35 x w 25 x h 16 cm- packaging weight: 600 grams- brand: mini hornit lids