1. Wide Compatibility：Designed for 25mm~35mm straight Olympic bars, it fits most mainstream barbell bar specifications with high fit and no easy sliding after installation. 2. High-Strength Cushioning Protection：Made of high-quality foam material, it effectively disperses the pressure of the barbell on the neck and shoulders, greatly reducing the oppression and discomfort during weight-bearing training. 3. Non-Slip Design for Safety：The surface features anti-slip frosted technology, which prevents displacement due to sweating or shaking during exercise and ensures training stability. 4. Waterproof, Sweat-Resistant & Easy to Clean：With waterproof and sweat-resistant properties, it only needs to be wiped clean after training. The foam material is not easy to breed bacteria, keeping use hygienic. 5. Ergonomic Fitting Design：Thickened elastic foam with a comfortable curvature that conforms to the neck curve closely fits the neck contour, improving wearing comfort and fit.