3.5 LB WEIGHTED THERAPY WRAP: 3.5lb weighted pad provides hot and cold feeling and pressure for deep stimulation, helps with tension, pain, and sore muscles, joints. HOT & COLD THERAPY - Great for after the gym, keep it in the freezer between uses and use as a neck ice pack, OR heat in the microwave to use as a hot pack for the ultimate relaxation session. The weighted shoulder pads stay ice cold for over 20 minutes, and then can be microwaved to be your favorite plush and weighted warm compress. The Pur Serenity neck wrap pad is a two-in-one solution for heat therapy and cold therapy, instead of using separate heat packs and an ice pack for neck. FULL COVERAGE DESIGN: Our high collar wrap is designed to cover the neck, shoulders and upper back to give you full comfort coverage and extend the its relaxing effects of heat around your neck and shoulders, maximizing comfort.