adidas F50 Adizero (Synthetic) TRX FG Soccer Cleats UPPER: Crafted with SPRINTWEB for quicker cuts and excellent stability in high speed dribbling with abrasion-resistant kicking area to leave your opponent in the dust. The single-layer SPRINTSKIN upper is used to create a snug fit and lightweight upper. OUTSOLE: The technology of the F50 lies in the outsole, featuring Sprint Frame construction. The Sprint Frame construction outsole provides the perfect balance between lightweight and stability. Also features a new stud shape to offer the utmost in stability and traction. adidas F50 adizero (Synthetic) TRX FG Soccer Cleats.