To reach your hair's fullest potential. Old Spice Hair Thickening System. Thickening treatment infused with castor oil. Strengthens the hair you have for a noticeably thicker look that people start to think, wow, I am noticing that. www.oldspice.com. Questions? 1-855-206-8287. www.oldspice.com. Made in USA of US and/or imported ingredients.