Certain Dri By Numero9 By numero9 on Nov 03, 2007 - Updated Oct 15, 2011

Certain Dri is an anti-perspirant (not a deodorant), for those who suffer from hyperhyrdrosis -- or excessive sweating. Certain Dri is available as a roll-on tube that contains only a liquid solution. A small amount works well, and a small container of Certain Dri is effective for a long time. Furthermore, Certain Dri contains no real fragrance, as it is supposed to be discrete.

Overall, Certain Dri works really well if you have embarassing sweating problems. However, if you suffer from excessive hyperhyrdosis, then it might not live up to your expectations. It can be applied anyhwere on the body, not just the underarms. I apply it to my hands as I have sxcessively sweaty palms. It has been effective, but the application is a pain in the area. I'm sure if you use the product for your underarms, this works much more ideally. Overall, I'm pleased by this over-the-counter product.