Yawnder Reviews
Simba’s Cool Foam name refers to a foam-focused mattress, whereas the brand also sells separate Hybrid mattresses with springs. This guide is for UK shoppers comparing the foam model; confirm the exact product and retailer because Simba’s lineup can change.
What is the Simba Cool Foam mattress?
Simba’s UK website mentions a Cool Foam Mattress and describes graphite-containing foam. We could not verify a detailed standalone current product listing during this update, so specific layer thickness, firmness, price and stock should be confirmed with the seller. A separately listed Cool Foam topper is not the same product as a mattress.

This page does not contain a complete model-specific standardized Yawnder test record. The following is buying guidance, not a newly measured firmness or cooling score.
Foam vs. Simba Hybrid
A foam mattress relies on foam comfort and support layers, while Simba’s current Hybrid mattress combines foam with a spring comfort layer. Foam can feel more enveloping and dampen movement; springs can change response and ease of movement. Neither design is automatically better—compare the precise mattress and your preferred sleeping position.
Simba markets cooling-oriented foam materials. Such materials may affect the surface feel, but bedding, room temperature and the sleeper also matter. No material name guarantees a cool night.
Who should consider it?
Side sleepers: Look for comfortable cushioning around the shoulder and hip without assuming an all-foam mattress will feel soft.
Back and stomach sleepers: Check whether your hips feel supported and the surface is comfortable in your usual position.
Couples: Foam can reduce movement compared with some spring beds, but performance depends on the actual construction. Try the mattress together if possible.
Combination sleepers: If you change position often, check whether the foam lets you move without feeling overly enclosed.
UK size, trial and returns
UK and US mattress-size names do not always describe the same measurements. Measure your frame and check the product’s dimensions in centimetres before ordering. Confirm foundation requirements, delivery and removal fees, and whether the exact mattress is included in the seller’s trial.
Simba advertises a 200-night UK trial for eligible products. Read the exclusions and conditions for the specific purchase; another retailer or market can offer different terms.
Frequently asked questions
Is Cool Foam the same as a Simba Hybrid?
No. Simba also sells separate Hybrid models with springs. Confirm the exact product construction before purchasing.
Is the Cool Foam topper the same as the mattress?
No. A topper sits on an existing mattress; it does not replace the mattress’s support core.
Does graphite foam guarantee cooler sleep?
No. It is one material feature, and the overall sleep environment affects temperature.
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Compare this mattress against 142 tested mattresses
Sort all 142 mattresses we have tested by pressure relief, support, cooling, motion isolation, edge support, price, trial and warranty, then filter by how you actually sleep. Of those, 84 hold a complete standardized record and 41 a partial standardized record.