Columbia offers its Columbia Men's Ritual Cotton T-Shirt in several colors (Columbia Navy pictured) for $14.99. Coupon code "COLOCT70" cuts the price to $9.59. Plus, Greater Rewards members receive free shipping. (Not a member? It's free to sign up.) That's $15 off list and a great deal for a men's Columbia T-shirt. It's available in select sizes from S to XXL. Deal ends October 30.