KeaBabies 2-Pack Snooze Baby Sleep Sacks are made from ultra-soft, breathable 0.5 TOG organic cotton, suitable for all seasons. Ergonomically designed to keep your baby snug & comfy with room to grow, these sleeveless blanket feature 2-way full-length zippers for easy wearing & quick diaper changes. Designed wide arm holes and hip area to allow natural movement during sleep Breathable, lightweight 0.5TOG organic cotton baby sleeping sack for all seasons Quick diaper change with 2-way smooth zippers & guard Easy to wear in 4 simple steps—open wearable blanket, lay baby inside, guide arms, and zip. Available in 3 sizes: S (26"), M (30"), L (33"). Machine washable and dry-able, stays soft and durable after washes