I have suffered from chronic back pain for years, especially lower back. I’ve tried everything. I actually find this product really helpful. It’s not expensive but does the trick. I tend to heat mine in the Microwave but my partner prefers it cold so pops it in the freezer.
Clifton's | Back Pain Relief Pack & Support Strap : Heat & Cool Therapy - Upper & Lower Back & Chest [Removed by moderator - advertising link]