Asics Gel Tambora 5 is a shoe designed for off-road running which offers effective protection and grip. The upper shoe is tough and breathable, designed with a mix of synthetic leather and mesh. The Trail Specific Outsole gives you optimal grip on wet and uneven surfaces. Rearfoot GEL cushioning system attenuates shock during impact and toe-off phases allowing movement in multiple planes as the foot transitions through the gait cycle. Removable Sockliner - Insole placed inside the shoe for added comfort which can be removed to accommodate a medical orthotic.