Comfortable Pain Relief - These adjustable hot and cold packs offer therapeutic relief for myofascial, soft tissue soreness as well as stiff joints and aching muscles. Hot or Cold Compress - Trek Proof medical-grade gel packs are safe for the microwave and freezer to easily rotate between icing and heating injuries. Improved Recovery - Along with general aches and pains, our therapy pads can help reduce headaches, swelling and fevers as well as relieve menstrual cramps and sinusitis.