Sealy's Ortho firm comfort mattress is ideal for firm mattress seekers.

40 Night Comfort GuaranteeComfort Grade FirmFoam FillingHypoallergenicOpen SpringRotate Regularly

Ortho Firm Comfort Mattress


In stock for free and fast delivery, choose your delivery date at checkout


This Sealy Ortho mattress provides enhanced firm support where your body needs it most. Exclusive to Sealy, the PostureTech Core Support springs are precisely engineered to offer consistent deep down support, allowing you to achieve a superior night’s rest. EdgeGuard surrounds the spring unit for added durability and edge-to-edge support. With an added layer of zoned foam, the mattress is designed to target the key areas of your body to provide pressure relief and long-lasting comfort.

A combination of Purotex and silky soft TENCEL™ fibres are nestled in the fabric of the mattress to reduce moisture and allergens that may cause irritation during the night. Endorsed by Allergy UK, Purotex works to keep your mattress clean, fresh and odour free. Over time, your mattress feels just as good as the day you placed it in your home.

Beds available separately; shop our range of beds here.

Mattresses over £249 are eligible for our 40 Night Comfort Guarantee.

Take a look at our Mattress Size Guide for helpful dimensions.

Key Features

  • Sealy's unique PostureTech Core Support spring system is engineered to offer consistent deep-down support
  • EdgeGuard provides edge to edge support and added durability
  • A layer of zoned foam targets the key areas of your body to offer added pressure relief
  • Quilted for a smooth, luxurious finish
  • Endorsed by Allergy UK, Purotex fibres work to keep your mattress clean, fresh and odour free
  • Made in the UK
  • 5 year guarantee
190 cm
74.8 inch
135 cm
53.1 inch
23.5 cm
9.3 inch

Please allow for a tolerance of +/-2cm (1 in)

  5 / 5  |  (3 reviews)

Comes in 1 packages

  • Package 1:Weight: 23.5 kgs

Free delivery on all orders

Our delivery partners will deliver your order to your room of choice. In order to maintain the well-being of you and our delivery colleagues, we have put in place social-distancing and hygiene measures, and the delivery teams will be fully kitted out with personal protective equipment. We would value your support in strictly observing social distancing at all times. Standard delivery times are between 7am and 6pm, Monday to Friday with Saturday delivery also available as an additional option.