Crocs knocks an extra 50% off a selection of men's, women's, and kids' sale styles via coupon code "EXTRA50" as part of its Annual Mega Sale. That's the largest extra discount we've seen from Crocs this year. Shipping adds $4.99 or get free shipping on orders of $24.99 or more. Deal ends September 19. A couple of best bets, each with free shipping: