Full beaded Pebax midsole with carbon fiber plate and a generous rubber outsole. Great for long races or key training runs. Like a more durable Endorphin Pro with better outsole and slightly more cushion. very minimal wear for 66 miles. TYR shoebox included. I just have too many racing shoes now and not enough races! Prefer CashApp, Apple Cash, or PayPal. Sorry, no Venmo.