You can find this product at www.coolibar.com
Other products that are helpful to manage perspiration include an anti-perspirant made by Certain Dri, available in the pharmacy. If you are opposed to using too many chemicals, you can also use fabric with good wicking qualities, such as the titanium lines offered by Columbia, Avia, and UnderArmour to name a few. You can use a long-sleeved shirt of this material and twist it around the end of the residual limb (similar to a shrinker) and then fold it back onto the arm. Of course, you could also cut off the sleeve of a long-sleeved shirt and then use it the same way (but why ruin a shirt that you might actually wear over the prosthesis at some other point?!). You might find the material at a fabric store -or be able to purchase from the manufacturer directly to sew your own sleeve. Should you do this, be sure to wear it with the seam on the outside, and not against your skin!