Salouo Retro Hippie Groovy Mushroom Print Baby Sleep Sack Wearable Halo Neutral Cotton SleepSack in Multi Dot (Size Small) Overstock Little Giraffe Pajamas Fuzzy Blue Sleep Sack Poshmark Camel Wool Long Sleeve Sleep Sack 2.5 TOG Blue Sky Kaiya Baby Shine Gray Bamboo Viscose Long Sleeve Sleep Sack gnamna. HALO SleepSack is the original wearable blanket for safe sleep, designed to help babies get better, longer sleep. As the next step after swaddles, it ensures a smooth transition with its zipper for easy diaper changes and a roomy, extra long sack that supports hip health and extends use. Crafted from breathable 100% cotton fabric, it offers cozy quality comfort your baby will love.