Crafted in snuggly fleece, this 1-piece takes him from playtime to bedtime in no time. Zip-up design makes for quick changes and easy dressing. Chemically treated? No way, Carter's polyester is flame resistant. Closure Type: Zipper Neckline: Crew Neck Sleeve Length: Long Sleeve Sleeve Style: Fitted Sleeve Fiber Content: 100% Polyester Fabric Description: Fleece Care: Machine Wash, Tumble Dry Country of Origin: Imported Fabric and fit are important safety considerations for children’s sleepwear. Sleepwear should be flame resistant or snug-fitting to meet U.S. Consumer Product Safety Commission sleepwear requirements.