• Safe, effective, and comfortable
• Use additional inserts for continuous relief
• Maintain a comfortable 58°F (14°C) for up to 3 hours
• Made from high strength Polyurethane
• Hook and loop stabilizers to secure packs in place
• Includes 4 Phase Change Cooling inserts per set
• Total weight: 4 lbs
• Use with: 4531, 6626 series, or 6627