A shoe has its own micro environment. Oakley technology controls the climate of that environment. Killswitch is lined with a textile that wicks excess moisture away from the foot. You ll even find it on the shock-absorbing EVA footbed. Oakley also uses premium grade leather, suedes and microfiber synthetics to match breathability with refinement. So Killswitch is more than just the science of climate control. It s proof that comfort looks good on you. Premium grade leather, suedes and microfiber synthetics for durability and comfort. Optimal foot climate maintained by moisture wicking materials of the highest quality. Maximized shock absorption and energy return via internal EVA midsole in advanced polymer formulation. High NBS rubber sole with engineered tread for secure traction on wet and dry surfaces. Durable rubber outsole.