K-Swiss Defier RS Men's Tennis Shoes are part of K-Swiss' 7.0 tennis shoe series, designed for serious tennis players who want the ultimate in Club and comfort. This series is the most technology advanced series of footwear that K-Swiss make. Technical features include:-

Shock Spring - located in both the heel and forefoot areas and provides cushioning.
Cushion Board Construction - this works with the Shock Spring to provide the perfect balance of support and cushioning.

Aosta 7.0 rubber outsole - a high density outsole provides durability from heel to toe.
Heel Grip Lining - heel lining is made of interlocking fibres which grip the sock to prevent the heel from slipping.

Dragguard - abrasion resistant is placed in the toe and heel area of the outsole. This provides a high life wear to the front and rear of the shoe and offers resistance to scuff damage.

Tectuff Toe Wrap - this provides extra protection against toe dragging.
Ortholite Insole - this antibacterial insole wicks away moisture from the foot to help keep it cool, dry and healthy.

Stay Tied Laces - designed to act as a catch to keep the laces tied.

Outdoor sole features a herringbone design suitable for use on clay and hard-court surfaces.