Ends 12/19 at 10PM PT. Home.woot! is selling up to 84% off Too Hot? Too Cold? Portable ACs, Fans and Heaters Sale with the discount shown on the product page. Shipping is $6; free for Amazon Prime members. 

The pictured BLACK+DECKER Comfortpak Wearable Cooling and Heating Device (2 Colors) is on sale for $19 (84% off).