Under Armour Proto Speed Trainer IV Mens Midsole Material: DCE (Directional Cushioning Engineering)--An integrated cushioning, stabilization and propulsion system that strengthens the directional movements and physical skills that you need. Outsole: Non-Marking Rubber--A non-marking rubber outsole delivers exceptional traction and durability. Cushioning Technology: Armour Bound--Proprietary UA material reduces foot-strike compression found in typical materials and provides superior rebound. Heel Technology: ArmourLastic--Absorbs shock, decreasing the effects of impact on the ankle and lower leg. Model Number: 1206573-005