Sweetnight full size mattress

I bought this mattress 6 months ago, and only used 1 month because I got another full-size mattress from my friend.
I really like this mattress because it's adequately soft and firm so my back pain is relieved a lot.

The original price is $394, and I'm selling this at $250.

https://www.amazon.com/Sweetnight-Mattress-Individually-Isolation-Moisture/dp/B096Y5YS1P/ref=sr_1_7?keywords=sweetdream%2Bmattress&qid=1687538780&sprefix=sweetdream%2Caps%2C133&sr=8-7&ufe=app_do%3Aamzn1.fos.c3015c4a-46bb-44b9-81a4-dc28e6d374b3&th=1