The cranial caps are primarily used for cold therapy to aid in relief with various headaches or to be used as a cool-down product after vigorous workouts to maintain over-heated body temperatures. The product is available in two sizes. CAP600 (sm/med) and CAP602 (Lg/XLg).  To figure out size needed: CAP-600 Approx. hat size: 8 & smaller: to figure, take tape measure-flexible, forehead to back of head.  That = inches.  Take inches and divide by pie (3.14) = hat size.  Does not have removable cover.  Does have water resistant material.  Product is sold by single unit.

A specially formulated gel:
This product is made with Elasto-Gel, a patented* gel with exceptional properties for transferring heat or soothing cold. If punctured, it will not leak and will remain usable. The unique combination of specially selected fabric and tough flexible gel provides an exceptional durable product for use in hospitals, rehabilitation centers, athletic facilities and the home.

The ideal hot/cold therapy:
The Elasto-Gel Therapy Products are designed to provide moist heat therapy or soothing cold therapy for relief of minor muscular and joint aches and pains. The hot or cold therapy will last 20 to 40 minutes per application. The product is microwavable so it can provide nearly continuous heat therapy. When used cold, the product conforms to contours, even at -20°F (-30°C), allowing comfortable soothing cold applications.