American Crew Hair Recovery Patches come from the Trichology Hair Recovery System For Thicker, Fuller Hair. American Crew state that forty percent of men will have hair loss by age 35. And none of them are happy about it. The Patch is easy to apply and the patch gradually releases the carefully selected ingredients as a man wears it, without any mess. The American Crew Hair Patches contain Rosemary, Swerta Japonica which work together to encourage the best environment for hair recovery. Can be worn conveniently and safely overnight.