75% Cotton, 23% Polyester, 2% Elastane Zipper closure SAFE SLEEP – keeps your baby warm in the crib without loose blankets. Comes with a zipper protector. ADJUSTABLE & EASY – shoulder snaps closures at the top to put sleepsack on baby. Comes with room to grow. EASY DIAPER CHANGE – in the middle of the night. High-quality YKK plastic zipper is located at the bottom of our sleeping bag, opens fully. SUPER SOFT & WARM – fleece (TOG 2.5) makes the wearable blanket perfect for all year round (Spring, Fall, Summer, Winter) MACHINE WASH – quilted baby sleep sack on gentle cycle up to 104?? F. Air dry and iron on low heat only. All fabrics are OEKO-TEX 100 certified.