ASTM F-1492 Skate safety standards Skate Certified : Features EPS Fusion Foam To determine proper size, measure around head with a soft tape measure or string; each helmet comes with bonus sizing liners to size one step up and down Recommended for ages 5+ The Mini Lifer is a scaled down version of our Lifer helmet. It is a smaller mold with shorter straps. The Mini Lifer helmet is great for little rippers with smaller heads. We include two extra sets of sizing pads to ensure a perfect customized fit. We recommend that you measure your head by following the sizing instructions on the link above.