Viekoo via Amazon offers the Prooral Ushanka Hat with Removable Windproof Mask in Black for $16.99 $19.99. Coupon code "EOLEU5KW" cuts that to $8.83 $10.39. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $5.58.) That's $31 off and the lowest total price we could find. This waterproof hat comes in one size. Deal ends February 11.