Soma.com has their Cozy nights sleep collection on sale for 70% off. You can also add a pair of their plush slippers to your order for free. They are also offering free shipping in time for Christmas.
Example deal: Sleepshirt $15, slippers – Free – Total $15
You can also get a coupon for 20% off your order with email signup. (it doesn’t have to be the same email account you are ordering from, and the code should work with existing accounts). I did this and it brought my order down to $12
Full list of sale items from the Cozy night collections:
https://www.soma.com/store/catego…t14149
Slippers:
https://www.soma.com/store/catego…at9659