The s1 mega lifer helmet is the safest, best selling, and best fitting certified high impact and multiple impact helmet on the market. The s1 lifer certified helmet is one of the best fitting and safest helmets on the market, trusted by not only our staff but the majority of professional scooter riders around the world. S-one Mini Lifer Helmet - Lagoon Gloss - S1 Helmets Australia S1 has been innovating gear for skateboarding since 1998 and has become the leader in creating the best skate helmets and skateboard safety gear on the market. S1 lifer helmet australia . Skateboarding, longboarding, bmx, roller derby. The s1 lifer helmet is certified to help protect your head from low force multiple impacts (astm standard) and single high impacts (cpsc certified). The s1 lifer helmet is s1 helmets flagship skate helmet.the s1 lifer is a break through design combining all the advantages of a high impact and multiple impact certified skate helmet with a low profile skateboard helmet look. ...