HALO's 100% cotton SleepSack wearable blanket in the Sunshine Rainbows print replaces loose blankets in the crib so baby sleeps cozy without loose bedding near the face. The sleeveless design helps reduce overheating, and the inverted zipper opens from the bottom for easy diaper changes without disturbing baby. Signature Back is Best embroidery reminds caregivers of the recommended sleep position, and the roomy sack design is recognized as Hip Healthy by the International Hip Dysplasia Institute. Lightweight TOG 0.5 cotton for warmer rooms; wear over regular sleepwear and machine wash with like colors. Small size.