The Very Hungry Caterpillar Print Zip Up Baby Pajamas MORI US Bamboo Sleep Sack in The Very Hungry Caterpillar Kyte Baby Sleep Bag in The Very Hungry Caterpillar 1.0 Caterpillar Sleeping Bag for sale eBay Bamboo Sleep Sack in The Very Hungry Caterpillar Kyte Baby. The one that started it all: Our most loved, best selling sleep bag. A wearable blanket that helps baby fall asleep (and stay asleep), so youre not up all night. Designed to be safe sleep, diaper change friendly, temperature regulating, and so soft youll have to touch it to believe it. Exterior: 97% Rayon made from Bamboo, 3% Spandex Filling: 100% Polyester Highly breathable J shaped double zipper