These super cozy onesie's are by Rabbit Skins. Here's the details:
Infant Lap Shoulder Bodysuit by Rabbit Skins
5.0 oz. 100% combed ringspun cotton (Heather is 93/7) 1x1 baby rib.
Double-needle ribbed binding on neck, shoulders, sleeves and leg opening.
Reinforced three snap closure.
White is sewn with 100% cotton thread.