What their spine needs at night
Their spine is still under construction
A child's spine starts life as a single curve, and the growth plates that lengthen their bones stay active right through the teens. The biggest daily pulse of growth hormone arrives just after they fall asleep, in the first stretch of deep sleep, and kids spend close to half of every day in bed.
What a saggy mattress does
A worn or hand-me-down mattress holds a fixed dip, so a light body rolls into the same hollow every night and the spine spends hours pulled out of its neutral line. That's the thing to avoid through the growing years, and it's a different problem from a mattress simply feeling soft.
How the Boutique holds them level
A child weighing 20 to 45kg barely compresses a surface built for adults. The Boutique's medium-firm feel and its 7 zone pocket springs flex just enough at the shoulders and hips to support a lighter body, so the spine rests closer to a neutral line while they sleep.

