The S1 Mini Lifer Helmet is fully certified to help protect against multiple low impacts and single high impacts. S1 Mini Lifer Helmet Specs: Smaller Shell Size to Accommodate People with Smaller Heads Specially formulated EPS Fusion Foam Certified Multiple Impact Protection Certified High Impact Protection 5x More Protective Than Regular Skate Helmet Deep Fit Design Expanded Outer Shell To Cover Ears AU/NZ Standard Certified (Australian/New Zealand Skate/Bike) AS/NZS 2063:2008 CPSC Certified (US Skate/Bike) ASTM Certified (Multiple Impact) F 1492 CE EN 1078 (European Skate/Bike) The S1 Mini Lifer Helmet is a scaled down version of our standard Lifer Helmet. It is a smaller mold with shorter straps. The Mini Lifer Helmet is great for little rippers or people with smaller heads. The S1 Mini Lifer Helmet is one of the best fitting and safest helmets for Skateboarding, Longboarding, BMX, Scootering, Roller Skating and Roller Derby. The Mini Lifer Helmet uses a specially formulated EPS Fusion Foam which allows it to protect your head from multiple low force impacts as well as high impacts. The Mini Lifer Helmet is a certified "multi-impact" helmet and is up to 5x more protective than the soft foam non-certified helmets. The Mini Lifer Helmet is a break through design combining the added safety of a CPSC and ASTM certified helmet with the comfort and fit of a non-certified helmet. The S1 Mini Lifer Helmet is the best fitting High impact and Multiple Impact helmet on the market. Refer to images for Size Chart