1. Prevents sweat from interfering with movement: When riding a motorcycle or exercising, sweat from the head and neck can easily flow into the eyes, causing blurred vision or irritation. The bike sweat guard directs sweat to the back or sides of the head through silicone flow channels or sweatabsorbing polyester fabric. 2. Balance of comfort and practicality: The bike sweat guard is suitable for short periods of lowintensity exercise (e.g., casual cycling), offering quickdrying and breathable properties, while the bike trainer sweat guard is designed for long periods of intensity training (e.g., cycling sessions) and extended outdoor use, efficiently protecting the bike frame during rides. 3. Easy to wear: The Rockbros phone holder comes with a mobile phone pouch, widely used for Rockbros bike phone training, ideal for fixed mountain and road bike rides. It is lightweight, portable, foldable for storage, and easy to carry. 4. Adjustable size: The bike trainer sweat guard features an adjustable buckle design. Simply use the elastic strap to attach one end to the seat tube (no need to remove the seat tube) and the other end to the handlebar, securing it at the steerer tube position to prevent sweat from dripping onto the bike platform or frame.