adidas Men's Soccer X15.1 Firm/Artificial Ground Cleats Synthetic UPPER: Techfit collar for a compression fit around the ankle. Reinforced X-Cage layers support X-skin synthetic MIDSOLE: Reinforced X-Cage layers. eXo skin layers with Non-Stop-Grip OUTSOLE: Exoframe outsole combined with X-CLAW specially-shaped studs for explosive acceleration on artificial grass and firm ground.