Children sometimes are not able to control their temperature, which means, that often they are either too hot, or too cold, and this is where the natural cashmere fiber comes into play, because it is a breathable material that acts as a natural regulator allowing to the wearer, (in this case to those who are covered by it while sleeping), to stay warm when it's cold and cool when it's hot.
No artificial material is able to do the same, as well as cashmere and natural fibers.
Consider that, unlike synthetic materials, cashmere it does not contain chemical or toxic substances, it is hypoallergenic, antibacterial and flame retardant.
Science has proven that babies sleep better in clothes and bedding made from natural fibers.