Review on Full Size Mattress, Avenco Full Mattress Hybrid, 12 Inch Pocket Spring And Gel Memory Foam Mattress Full In A Box, Medium Firm, Strong Edge Support, CertiPUR-US & ISPA, 100 Nights Trial by Carol Perez

I let the mattress rest for the prescribed 72 hrs.The bed's more 'Hard' than supportive 'Firm'.This hybrid mattress is to be used 'without a foundation' - 'means it's safe for you to use the mattress without the bedstead.'Might explain what I wrote previously: feeling lack of support of the lower back - which is the reason for getting a firmer bed - and rib discomfort.

I think having the correct base frame might make the difference.It 'looks' like a nicely made Mattress."Supportive Comfy Topper" can be helpful.The Avenco Team was "very helpful and supportive" to help me thru this process. So I gave them more stars for that kind assistance.