Where possible, we only use 100% GOTS certified cotton. According to organicfacts.net it is 'the best and the safest natural fiber on Earth!'. Sounds good to us. Below is some more information on organic cotton.
Organic Cotton is cotton that is grown without using any chemical fertilizers or pesticides on it. It is grown on land that has been treated and given sufficient time (at least three years) for the removal of all the toxic residues of chemical fertilizers and pesticides used earlier on it. The cotton is from original plants, meaning plants that are not genetically modified and that have not been treated with any chemicals (washes, bleaches, colors, or scents) during its processing and packaging.
Organic Cotton can rightly be called the most skin-friendly, most soothing, and most harmless natural fiber. While conventional cotton can sometimes be irritating to newborn skins, Organic Cotton is never like that. It is the ideal material for protecting and cleaning newborn babies, particularly for making clothes, baby crib bedding, baby clothes, towels, and thousands of such things.
(Image and information from www.organicfacts.net)