Viekoo via Amazon offers the Prooral Unisex Winter Hat for $16.99. Clip the on-page coupon, and apply coupon code "SFTAO46E" in-cart to drop the price to $9.34 $9.29. With free shipping for Prime members, that's tied with last week's mention as the the lowest price we've seen. (It's $3 under the best we could find for a similar one sold elsewhere.) It features ear flaps, a face guard, and chin strap. Deal ends August 30, 2018.