LightInTheBox offers the the Kigurumi Unisex Zebra Polar Fleece Pajamas for $15.99. Coupon code "COS906030" cuts that to $14.99. With free shipping, that's $35 off list and the lowest total price we could find. It comes in sizes S to XL. Deal ends December 2.
Note: Uncheck "Add Shipping Insurance to your order" during checkout to remove the 49-cent fee.