High-quality materials and a durable structure: The main body is made of EVA and high-strength PVC, integrally molded. The rollers are sturdy, have a high load capacity, and prevent deformation during use. The hollow design achieves a lightweight of approximately 0.8 kg while maintaining excellent support. It balances portability and durability, offering a long lifespan and lasting use. Standard 33cm size and portability: The 33cm fixed size is convenient to hold and store. It doesn't take up space in any situation, whether at home, in the gym, or on the go. The lightweight design makes it easy to carry, and it can be used by both men and women. It caters to muscle relaxation for various heights and situations. Wolf-tooth-like protrusions and relaxation effects: The surface has wolf-tooth-like protrusions that accurately stimulate muscle groups by rolling or pressing, effectively relieving muscle tension and pain. By relaxing muscles in various areas such as the back, waist, legs, buttocks, and soles of the feet, it loosens the fascia and promotes muscle recovery. Suitable for post-exercise and post-training daily fatigue recovery.