The Defier RS® is developed to meet the highest demands of the intense competitive player, seeking stability and durability. The outsole is made of Aösta® 7.0 rubber for durability combined with Drag Guard ™ abrasion resistant wear zones in the forefoot and heel.Stability during changes of footing is guaranteed by the Cushion Board ™ concept under the midfoot area. Shock Spring® technology provides cushioning and comfort.