Linning??100% soft, breathable cotton. Shell??80%cotton20%poly.With micro-soft plush.Perfect for three season use. Completely washer safe and BPA, toxin and phthalate free. Exceeds safety standards Hidden inner zipper.Full handmaking top stop. Two-way long zipper extended from chest to hem .Easy to put on and off . Pull smooth to prevent zipper stuck because of high quality.Make midnight diaper changes a breeze. Three sizes??S (6-12 months,14-23 lbs, 24-30 in), M (12-24 months ,23-32lbs, 30-36 in), L (24M-3Y ,31-40 lbs, 35-40 in) This wearable blanket to grow with your baby and make it the perfect swaddle transition product.