Mid-level quality synthetic comforter - the "cooler" version, which I found to be just the right weight to use year-round. Bought last September.

Full size, but I used it on a twin XL bed. You won't be able to tuck it in at the bottom, but it's wider and thus good for hiding things that are under the bed, burritoing in, or sharing ;)

Includes duvet cover and two matching pillowcases. You can have the pillows for free if you want - they're a little thin.

Comforter: https://www.ikea.com/us/en/catalog/products/40271508/
Cover/cases: https://www.ikea.com/us/en/catalog/products/60287711/
Pillows: https://www.ikea.com/us/en/catalog/products/00282740/

$80 OBO for everything