First Class lamb plush fabric is used for the outer surface of the product - and cotton lining is used on the inside considering the baby's health. There is another fiber layer between the outer and inner fabric for warmth and comfort. There are 2 velcro fasteners on the product to easily wrap your baby. 100 percent domestic production 0- It is offered for sale in 3 different sizes: 4 months, 4-7 months and 7-12 months.