6pm takes up to 85% off select men's, women's, and children's swimwear, with deals from $6.99, during its Memorial Day Sale. Plus, all orders qualify for free shipping. That's tied with our March mention as the best sale we've seen on swimwear at 6pm since last summer. Choose from brands such as DKNY, Guess, Diesel, and Billabong. Deal ends May 28. Some best bets: