I found the definition of Sherpa fabric online as:
Sherpa is a curly piled fabric structure made of synthetic yarns like acrylic or polyester. The texture is soft and fluffy, useful in jackets resembling wool or sheepskin on the piled side. Sherpa fleece is a knitted type of fabric usable in line clothing and winter wear.
Because the texture of Sherpa fabric is soft and fluffy, there may be a tiny bit of Fuzz causing the baby's eyes to be irritated. If the sherpa sheds a bit, the fuzz will go away with several washings. My 4mo old Grandson was sensitive to the plush minky backing on his quilt until it was washed and dried several times in dye free, scent free detergent.