A scaled down version of the s1 lifer helmet the mini lifer helmets are perfect for people with smaller heads but still features the same specially formulated eps fusion foam that you39ll find in the lifer helmetss1 helmet co are an independently owned and operated brand that is deeply rooted in the californian skateboarding longboarding bmx and roller derby scenes today s1 helmet co has an extensive line of protective helmets that are rapidly becoming known throughout the industry than