A doll accessory is something a lot of children could find enjoyable. The material choice for this doll accessory is fabric and plastic.
From Amazon
DOLLSWORLD from Peterkin | Doll's Sleeping Bag | Sleeping bag with velcro fastening, suitable for dolls up to 41cm (16") | Dolls & Accessories | Ages 3+
Booghe Toys & Games
Dolls World Sleeping Bag