Alpinestars' Kickstart line is dedicated to the young champions of the future, designed for kids aged 4 - 9 years old. The Bionic Kickstart Knee Guards feature a lightweight and protective articulated knee and shin guard, plus a double strap elasticated closure. The Kids Bionic Kickstart knee guards offers a full range of adjustment as the rider grows. Articulated knee and shin construction. Double elasticated closure. Full range adjustment. One size fits most youth. Sold as pair.