100% Polyester TIPS: Because Amazon’s Customize Now can only upload three photos, If you want custom-made 4, 6, 9 photos collage blanket, Please send your photos to our mailbox. (The method of sending mail, Please check the detailed information on the second picture beside the listing). 1. PAYMENT AN ORDER: Choose Size ~ Click Customize Now to enter Your email ~ Add to card & payment, 2. SEND PHOTOS: Click Attach files or Paperclip icon in your email to add photos, Then send to our email Made of 100% polyester, Anti-pill fleece fabric is easy to care for, and resists pilling and frays. Sherpa side is non-customizable and the color is white. Wash before first use.Sturdy hand sewn edge stitching for a clean finish. Designer Tip: For high-definition printing, Please upload high resolution photos.