Designed for little ones who don t settle in just one position, Halo SleepSack SwaddleStretch offers natural movement with gentle support. Stretchy sleeves allow arms up, out, or anywhere in between—while soft structure helps ease the startle reflex for better rest. The roomy, hip-healthy sack supports natural leg movement, and a two-way zipper makes changes easy. Stage 1 of Halo s trusted sleep system, from hospital to home.