Simba HeatRelease™ Mattresses Explained: Pro vs Luxe vs Ultra

Simba has just launched HeatRelease™ technology across its Hybrid range, and it's live in time for the September sale at up to 30% off. But it's rolled out differently across the three Hybrid models, so it's worth knowing what you're actually choosing between before you buy.

What HeatRelease™ is

Simba markets HeatRelease™ as an upgrade aimed at hot sleepers, layered on top of the existing cooling features already built into the Hybrid range, the Stratos® "cool-touch" cover, breathable wool layer, and graphite-infused Simbatex® foam. Simba hasn't published independent lab results for how much extra cooling it adds over the standard Hybrid range, so treat it as an incremental upgrade rather than a proven leap.

Hybrid Pro with HeatRelease™

The Hybrid Pro is Simba's flagship and best-known model, built with two layers of Aerocoil® microsprings and Simbatex® foam, plus steel SupportCore™ springs for targeted support. HeatRelease™ is available here as an optional upgrade, not standard, so if you're buying a Hybrid Pro, check you're selecting the HeatRelease™ version specifically. It's included in the current 30% sale discount either way.

Best for: buyers who already want the Hybrid Pro's support and motion isolation, and want to add cooling on top.

Hybrid Luxe with HeatRelease™

The Hybrid Luxe sits above the Pro in Simba's range, generally with a plusher feel and additional comfort layers. Like the Pro, HeatRelease™ here is an optional upgrade, also included in the 30% sale discount.

Best for: buyers who want a softer, more premium feel than the Pro, plus the same optional cooling upgrade.

Hybrid Ultra with HeatRelease™

The Hybrid Ultra is the one to know about if cooling is your main priority: HeatRelease™ now comes as standard, not as an add-on. That makes it the most straightforward route to Simba's newest cooling tech without having to remember to select an upgrade option. It's also 30% off in the current sale.

Best for: buyers who overheat at night and want cooling built in by default, without extra steps.

The honest downside

This is brand-new technology, Simba's HeatRelease™ mattresses have only just gone live, which means there's no long track record of customer reviews yet to confirm how well it performs over time, or how it compares to established cooling mattresses from other brands. If you want to buy with more certainty, it may be worth leaning on Simba's 200-night trial and 10-year guarantee, which apply across all three models, to buy now with less risk.

Bottom line

If cooling is your top priority and you want the simplest option, the Hybrid Ultra is the one to pick, since HeatRelease™ comes standard rather than as an upgrade you have to remember to add. If you already prefer the Hybrid Pro's support profile or the Luxe's softer feel, adding HeatRelease™ as an upgrade gets you the same underlying technology. All three are part of the September sale at up to 30% off, and current pricing by size is on simbasleep.com

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