Coolibar, which sells sun-protective clothing, takes 20% off sitewide via coupon code "BLK16" during its Black Friday Sale. Plus, the same code takes an extra 45% off sale items. Even better, the same code yields free shipping. Combined, that's the best discount we've seen from Coolibar. Some exclusions apply, including gloves, footwear, and eyewear. Deal ends November 28. A couple of best bets, with prices after coupon: