The Rapid Relief?� Instant Warm Packs with patented Insta Gel technology deliver soothing warmth directly to the skin for therapeutic healing. Patented gel technology turns from liquid to a contouring gel when activated, allowing for the product to contour to each affected body part. Tested to retain heat much longer compared to other traditional instant warm packs.Features* Temperature: Delivers approximately 44??C/111??F of warm therapy when activated at room temperature* Gentle Touch technology, which means this product can be applied directly to the skin* FTP (fold-to-pop) technology, allowing the user to activate the warm pack simply by folding it in half* Direct-to-skin application with Gentle Touch technology* Tri-lingual packaging (English, Spanish and French)ApplicationINSTANT WARM THERAPY RELIEF:* Arthritis pain* Relax sore muscles* Improve the flexibility of tendons and ligaments