I've been relying on the 96 hour patches for many years to manage severe sciatica. They've been crucial in pain control. I recently had back surgery and am unsure how much I'll use them moving forward. I just wanted to express my gratitude. They really helped me stay active and motivated, which was no easy task. I appreciated the personal messages included in the package. Plus, I've gathered quite a few of the little bags, which are useful from time to time.