Although baby's skin feels smooth and soft, in actual fact, a newborn baby's skin is only half the thickness of an adult's skin — so thin and delicate. Apart from that, it is more susceptible to external stimulation because it has less sebum as compared to adult's skin, easily becomes dry, and has a weaker function to protect against moisture. That wonderful smooth and soft skin actually has a weak barrier function, so it is delicate and easily damaged.

For some reasons, a baby sweats even when they sleep. As a result, the amount of sweat made by a baby is twice as much as an adult!^*1 Even though a baby’s body is smaller than an adult, the number of sweat glands is the same. So, the density of sweat glands on the skin is greater in babies and they sweat more than adults. In some cases, sweating can be irritating and cause rough skin. We don’t underestimate it by thinking it is just sweat, but also needs to be well taken care of.

Babies pee more than adults in a day. Up to about three months after birth, it can go up to 15 to 20 times a day. Immediately after peeing, the moisture level in the diaper is 80%^*2 or even more! This stuffiness can contribute to annoying diaper rash. Diaper rash is a condition in which the skin becomes inflamed, especially in the area where the diaper is in contact with the baby, and it becomes red and lumpy, or the skin will start to crease. The moment when babies experience diaper rash, they cry when they pee or poop because it hurts, it is really distressing to see this.

The inner diaper is warm and humid, baby's skin may become wrinkly and is more prone to inflammation.
In addition, there are various other factors that may cause skin irritation to baby's delicate skin such as rubbing of baby's skin against the surface of diapers or direct contact of the pee and poo in the diaper with baby's skin.
Baby's skin especially young babies is delicate, so Merries would like to keep the diaper away from stuffiness and moisture as much as possible.