K-Swiss Bigshot 2.5 tennis shoes are built with unmatched support and durability. Aggressive, competitive players that demand high performance from their shoes will appreciate the reliable fit and maximum stability. Doubles champions and twin brothers Bob and Mike Bryan chose these shoes to help them reach the top. Upper:Stay-Tied Laces act as a “catch” to keep the laces tied. Flow Cool System enhances breathability and moisture management from heel-to-toe to keep feet cool and dry. DuraWrap delivers an extra line of defense against excessive toe dragging. Padded tongue and heel collar enhance comfort.Midsole: Heel Grip Lining is made of interlocking fibers that grip the sock to minimize heel slippage. 360 PSC Plantar Support Chassis is a 360° thermal plastic that enhances midfoot and heel stability. K-EVA special formula EVA provides maximized cushioning and enhanced durability of the midsole. Ortholite provides moisture management with anti-microbial properties to keep the feet cool and minimize the effects of perspiration.Outsole: DragGuard™, located in the high wear areas of the toe and heel offers increased abrasion-resistance. AOSTA 7.0 is a high density outsole that provides unsurpassed durability from heel-to-toe.