Promise by Open

At Open, our promise is to source the finest in healthful, superior-quality materials, and then use them to craft a singular sleeping experience for you, your sleeping partner and family. We take that promise to heart and that is why we named this mattress Promise.


Natural and durable with gentle lift, our all-latex Promise mattress combines a gently zoned base core with a highly elastic surface.


The unique construction of the Open Promise enables it to yield to your body’s curves while still providing plenty of stable support. A full 8 inches thick, this latex mattress features a separate 2-inch top layer of plush Talalay latex foam, and a 6-inch zoned core that is is available in two firmness options. Together the two layers create a uniquely quiet yet gentle sensation that provides exceptional comfort. The Open Promise mattress will retain its shape and consistency over time while providing excellent contour and pressure reduction for your hips and shoulders.

The 7-zone Promise, all-natural latex mattress foam is free from harmful chemicals and is made entirely of natural Talalay latex, not a blend of natural and synthetic foams. This means our foam cores are extremely durable and have an even, firm density with an elastic feel. We cover our latex mattress with a breathable organic stretch-cotton cover, lined with wool, to keep you drier and stabilize your body temperature for a deeper sleep experience.


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7-zone 100% natural Talalay latex core for optimal contour

  • A comfort layer of 2 inches of 100% natural Talalay latex
  • Breathable wool-lined organic cotton cover for cool, dry sleep
  • Eco-positive components, built to last
  • Four firmnesses to choose from – dual-sided option for couples

Size Availability

Available in all standard sizes

Healthful Sleep

Components certified to be safe from harmful chemicals by Oeko-Tex 100


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Organic stretch-cotton cover

Open cotton is organic, pesticide-free and washed to remove any ultra-fine cotton dust, which can be a potential allergen.


Lined with Plein-Air Wool®

French for “out in the open,” Plein Air wool comes from sheep that live outdoors year ‘round. The resultant fibers are longer and curlier for a more luxurious feel.


Natural Talalay latex foam

Natural latex is more elastic, dense, resilient and durable than polyurethane foam. And in combination with stretch-cotton and wool, optimizes airflow allowing perspiration to evaporate, avoiding heat build-up.


6-inch Zoned Core

Available in two firmness options


Flexible Slat Base

Add to your Promise mattress for the ultimate in support and comfort.