CERTIFIED SAFETY HELMETS : Certified helmet passed CPSC1203,ASTM1447 and CE1078 safety helmet standards,DKONI helmets (Hard ABS shell+US EPS material foam+removable hot pressed inner linings,lightweight and sturdy ) provide toddlers/youth/adults with both comfort and impact resistance when enjoy multi-sports HELMET SIZES RECOMMEND : toddlers/kids bike helmet Small size:18.9-20.5inch(48-52cm). Skateboard helmets for kids 8-14/adult women suit for Medium size: 20.5-22inch(52-56cm). Skate helmets for men is Large size: 22.4-24inch(57-61cm). MULTI-SPORTING PROTECTIVE GEAR: DKONI cycling helmet/skating helmets are flexible and suitable for Multi-sports activities, include balance bike, skateboarding, scootering, biking,inline,roller skating,BMX, MTB.DKONI helmets provide the safety for toddlers/kids/youth/boys/girls/adult/men/women SIZE ADJUSTABLE HELMET : DKONI skateboarding helmet/cycling helmet with well-attached adjustment dial, skin-friendly adjustable chin strap and 3 sizes range from 18.9ich-24inch maximize the helmet fit different head sizes from toddler to adult. SIZE CHART:three sizes helmet from kids helmet youth helmet to adult helmet S(kids/teens): 18.9-20.5inch(48-52cm),M(youth/women): fits 20.5-22inch(52-56cm),L(man):22.4-24inch(57-61cm) GREAT GIFTS: DKONI skateboard helmets provide 5 colors (black/white/blue/pink/gray) and 3 sizes(S/M/L) options suit for multi-sports(Longboard,cycling,scooter) and different people(toddlers/youth/adult). Great gift for Birthday, Christmas, Thanksgiving, Halloween to your kids, friends and relatives. Your will get DKONI skateboard Helmet for multiple outdoor sports,extra removable hot pressed liner,friendly customer service. DKONI Skateboard & Cycling Helmet Sport Protective Gear: MULTI SPORT HELMET SKATEBOARD,BIKE, SKATE, SCOOTER,BMX, MTB for toddlers, kids/boys and girls/teens/youth, adults, woman and men. skateboard accessories,bicycle accessories,cycling helmet,skate helmet, longboard helmet,Skateboard Helmet,skateboarding helmets,Skating Helmet,skating helmet adult,outdoor Sports Helmet,Bicycle helmet,Scootering helmets,Roller Skate helmets,Rollerblading Inline helmets,ice skating helmets,kids helmets,scooter helmets for men, girls skateboard helmet,skateboard helmet for kids 5-8,skateboarding helmet for kids 8-14,youth helmets,skating helmet for youth 8-14, adult helmets,Rollerblading helmet for Woman,helmet for Man.Adjustable Helmets,BMX helmets,toddler bike helmet,skate helmet for kids 8-14 DKONI safety helmet suit for multi sports: Cycle Skateboard Scooter Inline & Roller Skate BMX Biking Two wheel electric Board Electric Self-balancing board Complies with U.S. ASTM F1447-18 Safety Standards for skateboarding and trick roller skating, U.S. CPSC Safety Standard for Bicycle Helmets Persons Age 5 and Older CE EN1078:2012+A1:2012 Helmet for pedal cyclists, skateboarders and roller skaters Kids bike Helmet which supply a full protection for kids on multiple outdoor sports. Material: ABS and EPS toddler's bicycle helmet. Kids bicycle helmet colors:Pink/Black/ Blue/ Gray/ White Feature: Helmet with adjustable internal regulator dial 14 vents let air go through the skateboarding helmet ABS and EPS, thickened soft sponge, comfortable and durable. The breathable pads provides effective shock absorption and sweat absorption, makes you cool and comfortable while wearing. The chin straps are easy to adjust, the buckle and velcro can be fastened and released quickly. Suitable Sport: Bicycle Ride,Bike Cycling,Skateboarding,Scooter sports,inline skating, biking, BMX biking,Inline roller,Kick scooter Roller blading