OfferUpSerta 12" medium firm king size mattress. We bought this November 2021. So just over 4 years old. Still in great shape, I just prefer a very firm mattress. 2 people slept on it over the years. Weight of sleepers: aroughly 175lbs and 150lbs. We had a mattress protector on it the entire time we've owned it but it does have some light sweat stains that made it through.
Posted Apr 11, 2026
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