can it be put on a box spring foundation

In our evaluation of the Serta iComfort Pro Level 1 Chelsea Medium mattress, we found it to be a Medium (5) on the GoodBed rating scale (1= firmest, 9 = softest).

Yes, the Serta iComfort Pro Level 1 Chelsea Medium mattress is adjustable base compatible. This means it is designed to be used on an adjustable base without incurring damage or voiding the warranty. In our review of this mattress, we tested it on an adjustable base to look for any adverse effects as the head and foot are elevated, and to see how well it conforms to the contours of the base both with and without the weight of a sleeper. Overall, we found the Chelsea Medium to have good adjustable base compatibility.

• Length: 10-year warranty.
• Indentation coverage: 1.5" and deeper.
• Proration: 10 years of full ("non-prorated") replacement coverage.

Here are the in-home trial details for mattresses purchased from the Serta website:

• Policy: Comfort Guarantee -- Mattresses can be returned for refund (after 30 day minimum trial).
• Fees: A 15% return fee + $200 for return shipping is deducted from the amount credited for returns.
• Notes: The iComfort/iSeries In-Home Trial Period is 120 nights. For other products, Serta's Comfort Assurance program is 45 nights.

Here are the delivery terms for mattresses purchased from the Serta website:

• Policy: Delivery available - Free with any mattress purchase
• Set-up: Set-up provided with delivery - Extra fee applies (+$150.00)
• Removal: Removal of old mattress provided with delivery - Extra fee applies
• Notes: Optional white glove delivery service includes set up, as well as the removal of packaging, your old mattress, and the box spring (if applicable).