Benefitting from HG10mm technology that raises the heel by 10mm to reduce stress on the lower limb and minimise the risk of potential injury, the Asics Lethal Speed RS is designed for comfort and durability. The new outsole tooling allows for great grip and release during play.Features Include:HG10MM - Shifts body mass forward reducing strain on lower limbs.REMOVABLE SOCKLINER - An EVA or SpEVA sockliner moulded to the shape of the foot which can be removed to accommodate a medical orthotic.SOLYTE MIDSOLE - Midsole material lighter than ASICS standard EVA and SpEVA + improve cushioning durability.