Proozy takes an extra 40% off a selection of Under Armour men's and women's shirts via coupon code "PZY40". Plus, all orders receive free shipping. Deal ends August 16. A couple of best bets, with prices after coupon:

Under Armour Men's UA Tech Patterned T-Shirt for $15 (pictured, low by $4)

Under Armour Women's UA Perfect Pace V-Neck T-Shirt for $15 (low by $11)