Kirkland Signature Hair Regrowth Treatment Minoxidil Foam for Men, 2.11 oz, 6-countED. 01 2027 Compare to the active ingredient of Mens Rogaine. Kirkland Signature Minoxidil Topical Aerosol, 5% (Foam) is an unscented hair regrowth treatment for men. This easy to use foam topical treatment revitalizes hair follicles and is clinically proven to help regrow hair. It is for men who have a general thinning of hair on the top of the scalp. For best results, use Minoxidil Topical Aerosol, 5% (Foam) twice daily. Results may occur at 2