It's one of the planet's fastest boots. It owes its light weight to a SprintSkin upper with TPU support bands, a Sprint Frame outsole, and a new stud shape. But like any great soccer cleat, the performance is in the details. The SprintSkin upper is a single-layer synthetic that not only reduces weight but gives you an excellent ball feel. The internal TPU support system increases stability on important lateral and medial movements. The TPU bottom frame reinforces the upper and prevents kicking-area abrasions. Inside the shoe is an ultralight sockliner, with an extra pair of comfort sockliners included in the box. In addition, the Sprint Frame construction of the outsole uses geometry for stability. The F50's new TraXion® stud shape is designed for maximum acceleration on firm, natural surfaces. Adult sizes are miCoach compatible, so with the reduced weight, you'll find out just how fast you can be. Wt. 4.5 oz.