About this item SOOTHING RELIEF ON DEMAND - This versatile hot and cold gel pack reusable goes from icy cold to comfortably warm in minutes. Pop it in the freezer for cooling relief, or give it a quick 20-second blast in the microwave for soothing warmth. If it requires more heat, follow up with 10 second bursts until hot . LASTING COMFORT FOR HOURS - This reusable gel pack for injuries stays flexible and maintains its temperature for up to 2 hours. Whether you're using gel packs for sports injuries or everyday aches, you'll get extended relief right where you need it. SIZED TO FIT ANY SPOT - At 12 x 29cm, this cold compress reusable moulds brilliantly to your body's contours. Ideal for soothing everything from a strained back to tender knee joints - these hot and cold packs are like targeted massage for your aches.