If you often have winter in your place, try to choose those that can give warmth like flannel sheets and down comforters. If you live in a place where the sun always rises and gives heat, then you may need to use satin and silk which are cooler on skin.
When buying a bed for your little girl, we should think about the time for which the bed is to be used. How long you will need your girl to use that bed. If you want the bed to last till she turns 6 or 7 year old, then you can opt for small sized toddler beds.