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 44C/111F 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