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NEW & IMPROVED: The same KOOL’N FX gel packs you love just got a whole lot BETTER. The NEW outer shell provides IMPROVED DURABILITY & BETTER CUSTOM FIT, over 20% MORE gel-stays COLDER LONGER and CONFORMS to the body for IMPROVED COMPRESSION. NO MORE LEAKS; 100% SATISFACTION GUARANTEED-Contact KOOL’N FX for a FREE replacement ADJUSTABLE IDEAL FIT Size Medium/Large measures 24” inches across and fits waist size up to 44” inches. To secure the back gel pack, place it at the pain site, then pull the strap and wrap it around the front; finally, adjust the compression level. Back gel packs are also available in sizes Small (measures 16” inches across and fits waist size up to 32” inches) and Extra Large (measures 31” inches across and fits waist size up to 62” inches) COLD RELIEF Place the NON-TOXIC gel pack into the freezer to help in reducing swelling and inflammation around the back. For HOT COMPRESSION, HEAT IN THE MICROWAVE in a bowl of water for increased blood flow- improves lumbar, waist, and abdomen pain. Also provides pain-relief for hip and back injuries, post-surgery, Sciatica, Herniated Disc & more ENGINEERED EXCELLENCE Finally a gel pack for your back that actually hits the high and low areas on your back WHILE STAYING IN PLACE and delivers results FAST. The gel pack delivers COMFORTABLE hot and cold therapy to the back. Engineered to fit snugly all while being LIGHTWEIGHT. Patented HEXFIT TECHNOLOGY allows the temperature-sensitive gel to flow evenly around the contours of the face, providing CONTINUOUS relief to the pain zone for FASTER EASIER RECOVERY WITH better MOBILITY REUSABLE & MULTI-PURPOSE Say goodbye to those bags of ice and single-use hot packs. KOOL’N FX gel packs are MANUFACTURED TO BE USED, over and over again. Long gone are the days when you’d have to hold a pack of meat against your back for pain relief. Designed for the shoulder and arm but may be comfortably used for relief in most other areas of the body. When not in use, keep gel packs in a PROVIDED storage bag in the refrigerator. Place in freezer for 30 minutes to 1 hour prior to use