【Multi-Size for Targeted Relief】The back roller wheel comes in 4 sizes, providing deep tissue massage to relieve tension and stress, allowing you to specifically target different areas of your back; use the large size for upper back and chest expansion, the medium for lower back release, or the small size for direct relief of shoulder and neck tightness

【Ergonomic Design】The back roller features natural spine alignment that fits between shoulder blades, protecting the spine while delivering a soothing massage; this trigger point massage tool enhances comfort, reducing impact on bones and dispersing muscle pressure

【Durable and Long-lasting】Constructed with high-density ABS material, this back roller for back pain supports up to 530 lbs / 240 kg and is not easy to break; the high-elastic EVA foam exterior ensures optimal cushioning and durability, resisting aging and cracking, retains its shape even after repeated use, making it a reliable back pain and stretching equipment