Asics Lethal Scrum Rugby Boots. Great value rugby boot designed for play soft ground. The Lethal Scrum from Asics offers performance, durability and style. Main material: Synthetic upper Removable sockliner can accommodate a medical orthotic. Board lasting. Solyte midsole material for lightweight, enhanced cushioning and durability. HG10mm heel height for reduced load on Achilles tendons, calf muscles, ham string and back. Rugby specific 8 stud outsole. Screw in aluminium rugby studs.