The Shimano RC7 SPD-SL Shoes is a fully featured lightweight road copetition shoe. Optimised for maximum comfort whilst delivering maximum performance. Shimano RC7 SPD-SL Shoes Features Ultra-rigid, lightweight carbon fibre composite sole Shimano Dynalast to reduce braking loss and increasing pedalling efficiency Two Boa L6 dials allow quick, micro tension adjustments Adjustable Powerzone wire guide holds foot securely Lightweight and supple high density perforated synthetic leather upper, featuring superior fit and added cooling Sole stiffness 10