Mattress height is one useful detail to compare alongside feel and construction. In the current ADAPTIV Sleep lineup, Horizon Firm is 11 inches tall, both Ascent models are 13 inches tall, and both Summit models are 15 inches tall. Those measurements describe the finished mattress height; they do not replace choosing the surface feel and construction you prefer.
Quick summary: Horizon Firm is the 11-inch option, Ascent Medium and Ascent Luxury Plush are 13-inch options, and Summit Luxury Firm and Summit Medium Plush are 15-inch options. Use the ADAPTIV mattress finder to start with your preferences, then use the mattress comparison to review the full lineup side by side.
11 inches: Horizon Firm
ADAPTIV Horizon Firm is 11 inches tall and has a firm profile. Its listed construction includes an ELEVAIRE Cover featuring AeroSync Climate Management, AeroTherm Cooling Gel Memory Foam, ComfortBridge Support Foam, a MATRIX BASE Precision Coil Array, and SupportCore Base Foam.
If a firm feel is your starting point, height is a simple spec to note while you compare Horizon with the taller Ascent and Summit models. The full product page provides the current model details.
13 inches: Ascent Medium and Ascent Luxury Plush
The two Ascent models are each 13 inches tall: Ascent Medium and Ascent Luxury Plush. They share a model family but offer different surface profiles—Medium or Luxury Plush.
Both Ascent mattresses include AeroSync Recovery Foam with Zoned QuickCool PCM, ComfortBridge Transition Foam, and a MATRIX BASE Precision Coil Array with ATLAS Support Edge. Ascent Medium uses ADAPTIX AirFlow+ 5-Zone Response Foam and AeroTherm Cooling Gel Foam, while Ascent Luxury Plush uses plush versions of those response and coil components. Compare the feel choice as carefully as the shared height.
15 inches: Summit Luxury Firm and Summit Medium Plush
The Summit family is 15 inches tall. Summit Luxury Firm combines AeroTherm Elite Cooling Gel Foam with Zoned QuickCool PCM, ADAPTIC ExtendiCool Climate Bands, ENERGIX AirFlow+ 5-Zone Response Foam, NanoFlex Zoned Microcoils, and a MATRIX BASE Precision Coil Array with 2X ATLAS Support Edge.
Summit Medium Plush is also 15 inches tall, with a medium-plush configuration that includes plush response foam, zoned plush microcoils, plush support foam, and a plush coil configuration. This model is available through authorized retailers, so its product page provides the appropriate shopping path.
How to use height in your comparison
- Start with feel. Choose between the Firm, Medium, Luxury Plush, Luxury Firm, and Medium Plush profiles before treating height as a deciding factor.
- Review the complete build. Height is one published specification; the listed comfort foams, response layers, microcoils, and coil array explain the construction differences across the lineup.
- Confirm the model and shopping path. Review each product page for current details, and note that Summit Medium Plush is retailer exclusive.
There is no single best mattress height for every shopper. Use the mattress finder to narrow the options, then visit the comparison page and the relevant product pages to compare feel, construction, height, and availability.