Ultralight makes it easy to achieve improved cycling performance. The X-SOCKS® BIKE HERO ULTRA LIGHT dominates cycling with ease and evolutionarily enhanced features. As part of the X-Socks 4.0 generation, these high-tech functional socks perfectly support your summer tours with numerous proven technologies. That is why they are patented. Special composite yarns and a patented ventilation system keep the feet dry and climate-controlled. The climate regulation of X-SOCKS is now even more effective thanks to the revised Air-Conditioning Channel® 4.0. The ergonomically optimized Lambertz-Nicholson Achilles tendon protector 4.0 enhances protection for the sensitive Achilles tendon. The Duckbill Shaped Footguard protects the top of the foot from pressure.