The adidas adiZero Prime Finesse track spike is designed for 100 to 400 meter sprint events. Welded, stitchless composite membrane upper with suede inner frame and Sprint Web overlay. Sprint frame supports the foot and transfers the power through the superlight chassis to the track. TPU plate provides lightweight performance and durability. Non-removable insole. Replaceable spikes. Comes with 3/8" compression-tiered spikes and a wrench. Wt. 4.6 oz.