VibraCool Flex is about options. Both hot and cold packs are included, and the unit can slip onto any strap or belt, or the included latex-free band.
Flex attaches to the provided latex-free strap or to your own belt, back pack, seat belt, etc. It also includes VibraCool ice packs and reusable instant heat packs.
Flex is perfect for relief for neck, shoulders, hips, lower back, piriformis, plantar fasciitis.