Ending today, Old Navy cuts 50% off its men's, women's, and kids' tank tops, T-shirts, polo shirts, shorts, swimwear, and more as part of its Memorial Day Sale. (Discount is applied automatically in cart.) Shipping adds $7, but orders of $50 or more qualify for free shipping. That's tied with our mention from last week as the best flat discount we've seen on any items from Old Navy this year. (We previously saw 40% off sitewide last week also.)