Merino should be used for all newborn babies 365 days of the year for night-time sleeping. In fact on those warmer nights, it works BETTER than cotton to help regulate temperature and keep your newborn baby cool. Newborn babies can not regulate temperature for up to the first 12 weeks of life - this means they might be cold even when its hot in the house. So it is really important to use merino against the skin so the merino garment can do the job for them.
Merino will draw the moisture away from your newborn delicate skin when warm and then as the temperature drops (between 3-5am) the merino will push the warmth back into the skin - so they don't wake up because they are cold. If merino hadn't been invented by nature, you'd be forgiven for thinking it was invented by magic. Unlike man-made fibres, it helps draw moisture away from your baby or toddler's skin and helps them maintain a safe and comfortable temperature in all weather.
The ability to absorb moisture is an important function attribute of Merino fibre, but equally important is its ability to release moisture. In contrast to most synthetic fibres, Merino has the capacity to remove large amounts (up to 35% of its own weight) of moisture from the skin surface before the fibre even begins to feel wet. Merino can prevent the 'clamminess' that can occur in environments with high humidity.
NB: Because infants and children have a higher surface area to mass ratio than adults this makes thermal regulation particularly challenging, and choosing the right garment or sleep system for children becomes extremely important - Merino kids are happy kids!
Bacteria and other micro-organisms can build up on the skin and in clothing/bedding, and their growth is enhanced in the presence of sweat secretions or other textile soiling. Merino outperforms competing fibres in terms of its resistance to the build-up of bacteria and odours Therefore using merino against skin helps greatly reduce a build-up of bacteria and controls odors by actively moving sweat and other moisture away from the skin.
Merino fibre has flame retardant properties exceeding those of all other commonly used textile fibres and affords excellent protection to wearers in terms of preventing ignition, but also in terms of the nature in which it burns (self-extinguishing, non-melting). Of course, while merino is a naturally low fire danger fabric we recommend you use the 'metre from a heater' rule whenever sitting by a heat source.
Babies - Unless the nighttime temperature is 24 degrees plus, then your newborn baby will either need several layers of clothing and bedding or natural body temperature regulating fabrics like 100% pure merino. Using merino against the skin will ensure that when your baby needs the warmth (because they can't regulate it themselves), then the properties of merino will retain and circulate the body heat. Likewise, when you put your baby to bed during the day or early at night when the heat is still in the sun the merino properties will draw and release moisture away from the baby. Premature babies may also need an extra layer of clothing until their weight is more full term - merino is really the only fabric to use.
Toddlers - Like with babies merino is perfect for toddlers, especially ones who kick off there covers and blankets, then wake between 3-5am because they are cold. Our merino/cotton sleeping bags combined with merino Pajamas or sleepsuits work together to prevent this.