Yoofoss Baby Sleep Sack is made of 100% premium cotton, ensuring utmost comfort and protection for your toddler's sensitive skin. It features long sleeves with mitten cuffs to keep your baby warm and allow free arm movement. The 2-way high-quality zipper allows for easy dressing and convenient diaper changing. The neck opening is precisely tailored for a snug fit, and the wide hem allows for free movement while keeping the baby warm. Available in four sizes, this sleep sack is machine washable and designed to withstand multiple washes.