Chattnooga Colpac Cold Therapy, Blue Vinyl, 5.5 X 7.5
There is a ColPac for Every Application - Seven Different Sizes of blue vinyl and four szies of black polyurethane ensure effective cold therapy for any body area or shape.  The material inside is called Bntonite which is essentially absorbent aluminum phyllosilicate or impure clay.  This product is more stiff than your usual ice pack and it’s because of the Bntonite.   These are the top of the line cold packs and last for a very long time.  In some circumstances, more than fifteen years.  These are extremely durable and consist of high quality material. There are no storage issues with this product.