Shimano's SD5 (SD501) SPD Sandals are a true icon, offering the ultimate in comfort for touring, bike-packing adventures, and everyday cycling. Improved sizing provides a better, more comfortable fit, and the comfort liner allows for sock-less riding, though wearing socks is highly recommended. A cleat-cap is included for use with non-SPD flat pedals. The semi-rigid Power Transfer Blade enhances walking comfort and ensures efficient pedalling with reduced power loss. Lightweight at just 720g per pair (size 42) with a stiffness rating of 4. The new SD5 offers improved sizing and fit compared to the original, making them even more comfortable for long, all-day rides. If SPD pedals aren't your preference, the included cleat cap allows them to be used with flat pedals. The semi-rigid Power Transfer Blade not only provides significant power-loss reduction for efficient power transfer but also allows for comfortable walking for extended periods, making them ideal for hiking or walking.