FORM Sleep: GelGrid mattresses made in the USA, now $400 off

Shopping at FORM? See all current FORM promo codes and deals, checked regularly.

FORM Sleep makes GelGrid mattresses in the USA. Every model uses its GelGrid comfort layer, a grid of open-air cells, with Integra-Mesh reinforcement underneath for a steadier feel. There are four mattresses across two series, from the all-foam FORM Core to the latex-topped Prime X, plus adjustable bases, a foundation, sheets, a mattress protector and a pillow. It suits shoppers who like the idea of a grid mattress and want a long trial before committing.

Shipping is free on every order. Prime and Prime X mattresses come with White Glove Delivery, including in-home setup and optional old mattress removal, while Core models usually ship within 5-7 business days via FedEx Ground. You get a 365-night trial (FORM picks the mattress up and refunds you in full if it isn't right, with no restocking fee) and a lifetime warranty against manufacturing defects. The mattresses are CertiPUR-US certified and fiberglass free.

What's worth a look

Six picks from the FORM range, with the starting prices shown on each product page when we checked.

The 10-inch FORM Core is the entry point at $1,149 for a twin, rising to $1,399 for a queen. If you prefer some bounce, the 12-inch Core Hybrid adds pocketed coils from $1,549. The Prime adds a Euro-Top and zoned support, and the 15-inch Prime X tops the range with Talalay latex.

The FORM Adjustable Bed Base has head, foot, lumbar and pillow-tilt control, Zero Gravity and Anti-Snore presets, massage and USB-C charging. It's listed at 30% off, from $1,399.30 for a twin XL.

Current offers

We're listing $400 off FORM mattresses, and the site shows that saving across all four models: the Core is $1,149 instead of $1,549 and the Prime X is $2,399 instead of $2,799 at the smallest size. The adjustable base is also reduced, and the upholstered foundation is listed from $300 instead of $350.

How to save more

• Sign up for FORM's email offers at the bottom of the site to hear about new promotions.
• Price up the full set-up together. A foundation costs much less than the adjustable base if you don't need the extra features.
• Use the trial. With 365 nights and free pickup, there's no need to pay extra for a higher model just in case.

Products, prices and offers checked on the store's own website on 5 Nov 2026. Prices and stock can change.

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