Outfitter's Note: this is a UNISEX-sized shoe. Men's sizes are shown — women should order 1.5 sizes below their standard running shoe size. For example: for a women's size 9.5 shoe, order a size 8.The Speedland RX:CCD is for runners who demand shoes that evolve with their goals. This hyper performance trainer transforms from your reliable daily shoe to race-day ready with removable components that let you customize your experience. The BOA Fit System with PerformFit Wrap gives you micro-adjustable precision that adapts to your needs, while the uncompressed SCF foam and proprietary drop-in midsole blend provide the responsive comfort that propels you forward faster than you thought possible. Details: Upper: Spacer mesh construction with strategically placed high-tenacity fiber delivers the perfect balance of breathability, durability and protection. The PerformFit Wrap activated by the BOA Fit System provides micro-adjustable precision fit that performs flawlessly in the toughest conditions, giving you confidence at any distance. Midsole: Uncompressed SCF foam pairs with a proprietary drop-in midsole blend elastomer to maximize comfort and responsiveness mile after mile. The removable rigid carbon plate gives you the flexibility to train naturally or race with maximum propulsion—it's your choice based on your goals for each run.Outsole: Scratch Rubber construction featuring Michelin OC1 Compound with FIBERLITE technology delivers exceptional traction and durability that serious distance runners need, whether you're grinding through training blocks or pursuing breakthrough performances.