The envelope wrap came very quickly, less than 2 weeks. There are no complaints about the quality of tailoring, the locks look durable, very convenient, that you can completely unzip all the locks and a blanket is obtained from the envelope. In fact, the outside is knitted from acrylic, and inside the fabric is polyester. I do not know how practical it will be with the baby. Envelope I think suitable for spring/autumn to 0 degrees. Seller and envelope recommend!