Unlike most major mattress brands, Sonno operates solely on an online platform. The Sonno mattresses are designed in Italy and made from natural latex as well as CertiPUR-US® certified polyurethane foam material. The foam material itself is environmentally safe from harmful chemicals like formaldehyde, lead and mercury. They are also breathable and particularly suitable for sleepers with chronic back pain, thanks to their medium-firm mattresses and natural elasticity of the latex that provides optimal support to the body. Sonno offers customers a 100-night risk-free sleep trial, before deciding if the mattress is for them. If not, you can return it and get a full refund. Moreover, the mattresses are vacuum-compressed in a box, making transport super convenient, even in lifts or small apartments! Sonno is available in four different sizes: single, super single, queen and king.