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Play Video: Hot and Cold Packs
These are the best cold packs I've found. The vinyl is extra thick and holds up without splitting like other, less expensive packs. Also, the gel doesn't feeze hard but stays flexible.
The Occupational Safety and Health Administration requires that MSDS/SDS be available to employees for potentially harmful substances handled in the workplace under the Hazard Communication regulation.
Material Safety Data Sheet / Safety Data Sheet