Last seen for £329 at Mattress Online on 25th June 2026
Silentnight Healthy Growth Astro Eco 600 Pocket Double Mattress
The Silentnight Healthy Growth Astro Eco 600 Pocket is a medium-feel pocket spring mattress designed for growing sleepers, available in UK Single and UK Small Double.
- Support that adapts as they grow
- Breathable fibres help kids sleep cooler
- 60-night trial & 5-year guarantee
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Some retailers still sell the earlier version of this mattress for less than the current model's best price.
More available sizes
Last seen for £329 at Mattress Online on 25th June 2026
Mattress details
Mattress
Silentnight Healthy Growth Astro Eco 600 Pocket Mattress
Size
Firmness
Medium
Construction
Pocket Spring
Eco-Friendly
Depth (cm)
24
Layers
3
Layer Details
Sleep surface
A breathable quilted sleep surface, which means a soft first point of contact that lets air circulate rather than trapping warmth.
Support system
600 Mirapocket springs providing zoned support, which Silentnight states is scientifically proven to improve spinal alignment and posture. Each spring moves independently, so support follows the body's shape.
Comfort layer
Breathable EcoComfort Fibres designed for cooler sleep, helpful if your child tends to overheat at night.
Layer details from silentnight.co.uk product page, September 2026.
Key benefits
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