Ergonomic Design : Experience enhanced comfort and control with our shift brake lever covers, designed specifically for Shimano models to ensure a snug fit and reduced hand fatigue. High Quality Silicone : Our covers are made from premium silicone, offering superior durability and resistance against wear and tear, while also being eco-friendly. Model Specific Fit : Custom-designed for Shimano Ultegra ST-6600, ST-6603, and 105 ST-5600/5601, these covers guarantee a precise fit, making them an ideal upgrade for your bike. Vibration Absorption : The textured design of our covers absorbs vibrations, providing a smoother ride and greater control on rough terrains. Performance Enhancing : Improve your cycling experience with covers that enhance your grip, allowing for quicker shifts and smoother braking. Upgrade your cycling experience with our custom-made Shimano lever covers, crafted for optimal performance and comfort. Designed to fit seamlessly onto Shimano Ultegra ST-6600, ST-6603, and 105 ST-5600/5601 levers, these covers offer a secure and ergonomic grip that enhances both control and ride quality.