F50 adiZero TRX FG Electricity/Infrared/Sharp Purple Anodized (12) SPRINTSKIN single-layer synthetic upper for great ball feel with less weight; TPU bottom frame reinforces upper and prevents abrasion Ultralight sockliner; Comes with second pair of comfort sockliners Internal TPU support bands for increased stability and support in lateral and medial movements Sprint frame construction offers the perfect balance of light weight and stability