Description
The Harmony Relax Firm is a 10 in (25 cm) foam mattress from Harmony's Canadian-made Relax line. It comes in Full, Full XL, Queen and King, all without a transfer edge, under part numbers FIRMFL, FIRMFLXL, FIRMQN and FIRMKG.
What does it do and how does it work?
It combines a cooling GelFlex top with a firmer middle and a firm core.
- The 2 in (5 cm) GelFlex top is made to regulate temperature.
- The 2 in (5 cm) middle layer is firmer and rebounds.
- The 6 in (15 cm) core is designed to contour with the Harmony adjustable base.
- The firm surface supports transfers and turning.
Who is it for, and who should choose something else?
It suits a person up to 350 lbs (159 kg) who wants the firmer of the two Relax feel options.
- Choose the Plush for a softer top in the same sizes.
- Choose a transfer-edge model if the bed needs one; those are separate products.
- Choose the Relax XC above 350 lbs (159 kg), or a medical pressure-relief mattress if the care plan calls for one.
Will it fit?
Match the size to the deck; the mattress is 10 in high.
- Full 53 x 74.5 in (135 x 189 cm); Full XL 53 x 79.5 in (135 x 202 cm); Queen 59 x 79.5 in (150 x 202 cm); King 76 x 79.5 in (193 x 202 cm).
- Split king is two Twin XL pieces, each 38 x 79.5 in.
- Harmony's Hi-Low decks are Full 53 x 75, Full XL 53 x 80 and Queen 59 x 80, so those mattresses sit about half an inch short; there is no king deck.
- Capacity is 350 lbs (159 kg); the lower of that and the bed's safe working load applies.
- The 10 in (25 cm) height changes rail height. Health Canada advises gaps under 120 mm (4 3/4 in) in zones 1 to 3 and 60 mm (2 3/8 in) in zone 4.
- A used mattress cannot be returned under our return policy.
Using it day to day
Place it on the deck or adjustable base and make the bed as usual.
- There is no pump, hose or power cord.
- The core is made to work with the Harmony adjustable base.
What does it work with, and what are its limits?
It fits a Harmony adjustable bed or Hi-Low deck of the matching size.
- It is not a powered pressure-relief surface and does not alternate pressure.
- It has no transfer edge; the transfer-edge versions are separate.
- It is not for a user above 350 lbs (159 kg).
How does it compare?
The Relax XC is the 600 lbs version. The Home Care with Recovery 5 has a different cover. A powered alternating mattress adds active therapy. See foam mattresses.
Frequently asked questions
Can I add a transfer edge to the Firm?
Yes, in Twin XL, Full, Full XL and Queen, but not King. See the Queen with transfer edge.
Can I use it on a king Hi-Low deck?
Harmony lists no king deck. A king mattress needs another base.
Can I order a single Twin XL?
Yes, as a separate product: the Twin XL Firm.
Funding may help: see who may help pay. Warranty terms are in the Warranty tab.
Specifications
- Weight capacity
- 350 lbs (159 kg)
- Construction
- 2 in GelFlex top, 2 in firmer middle layer, 6 in firm foam core
- Comfort settings
- Firm
- Edge support
- No transfer edge on this mattress
- Mattress width
- Full and Full XL 53" (135 cm); queen 59" (150 cm); king 76" (193 cm)
- Mattress length
- Full 74.5" (189 cm); Full XL, queen and king 79.5" (202 cm)
- Mattress height
- 10" (25 cm)
- Made in
- Canada
- Warranty
- 10 years
- Product type
- Foam Mattress
Figures from the manufacturer. Options and seat sizes can change them; we confirm yours before ordering.
Documents
Delivery and service
Delivery and setup
We deliver and set up equipment across Toronto and the GTA, and show you how everything works. Custom and special-order products can take longer; we confirm timing with you before delivery.
Service and repairs
Our technicians service what we sell, at home or in our shop.
Try before you buy
Visit a showroom in Etobicoke or Brampton to try products first, or book a free home assessment.
Warranty
Warranty details
Harmony gives the Relax memory foam mattress a 10 year limited manufacturer's warranty. The full written terms come with the product.
- Mattress: 10 years, limited.
Questions about this product?
Talk to our team, try it in a showroom, or book a free home assessment. We help with sizing and funding.










