ULTIMATE COMFORT AND SAFETY: Ensure your baby boy's comfort with our Merlin Sleepsuit 3-6 months. The Magic Merlin Sleepsuit's exterior is breathable cotton inner layer provide warmth without overheating for a peaceful sleep IDEAL SIZE FOR GROWTH: Our sleepers are sized for 12-18 lbs, this Magic Merlin Sleep Sack accommodates your baby boy's growth, ensuring comfort while transitioning from swaddle to sleep sack