They feature lots of technology including Vibrocore

Fitting easily and neatly onto the seat post and saddle rails

Zephyr silver anodized finish with laser-etched logos (11-36)

or in your frame's manual if you're not sure which size you need

Leatt Airflex Hybrid Knee Guard - 2XL - Black Exclusive They feature lots of technologyThis is the ultimate slim design knee guard with CE certification. Featuring the latest Airflex impact gel technology the knee guard is soft and flexible but extremely tough and capable of taking hard impacts. The additional sliding plate helps deflect energy, letting you get back up and keep on riding. The premium comfort comes from the soft touch fabric of the sock. The tailored design of the sock and stretch material will adapt to any leg shape and