A child spends significantly more time in contact with their mattress fabric than an adult — longer sleep durations, daytime naps, and the tendency of children to press their face and skin directly against the mattress surface during sleep all increase skin exposure time. OEKO-TEX certification verifies that the fabric used has been tested for harmful substances including formaldehyde, pesticide residues, and heavy metals, confirming it meets a defined safety standard for skin contact. The DHS single mattress carries OEKO-TEX certified knitted fabric alongside UKFR certification for fire safety, measuring 90×190cm in 20cm thick hybrid construction with Bonnell springs and cool gel memory foam, dust and mildew resistant, with a 30-day guarantee and 1-year warranty.