100%cottonErgonomic Design for Better Sleeping- Adopts Biological design to imitate mom's womb which gives the infant a comfortable environment and a familiar sense of security. It helps with common newborn sleep issues like wanting to sleep in a parent's arms or frequent waking.Safe &100% Hypoallergenic Breathable Fabric- Baby lounger nest is adopts soft and durable pure cotton fabric which is safer for baby's skin,and the nest with moisture-wicking elastic 3D polyester fiber filling, thick reinforced sponge pad (1.6") protects baby spine, provides spinal support to encourage natural growth .So you can use it as a travel baby bed without worrying about hard flooring .Multifunctional Baby Nest- It is suitable for newborns from 0 to 12 months. The baby nest sleeper makes the perfect lounger, not only a sleeper for baby, it can also be used for other things like tummy time, bassinet for a bed or cribs, side sleeper, travel bed, rest spot,and travel mat,changing station.You can put it on the living room floor, sofa or baby cot.