Just in time for warmer weather, HALO SleepSacks and Swaddles are now available in 100% cotton muslin. Muslin is a finely woven breathable fabric that makes an excellent choice for your baby. A lightweight muslin SleepSack keeps your baby comfortably warm while reducing the risk of overheating. SleepSacks are sleeveless wearable blankets that are a safer choice than loose blankets for baby. Loose blankets can cover a baby's face and ...