• Breathable sleep sack for summertime temps • Designed to be worn over sleepwear • Covered zipper tab for safety • Bottom-to-top zipper for easy putting on • Made with 2 layers of breathable cotton muslin • Sizing options: 6-12 months, 12-18 months • Tog rating: 1.0 for nursery temps 68°F-75°F • Machine washable for easy care • Gets softer with each wash