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Very good tool for body.
These are great. We first used them when offered by a Chiropractor several ywars ago. These hold heat and/or cold for a good while and are excellent for sore muscles, headaches etc.
The Occupational Safety and Health Administration requires that MSDS be available to employees for potentially harmful substances handled in the workplace under the Hazard Communication regulation.
MSDS ALL-TEMP Hot/Cold Packs