For temps 63-70 Can be used with angel wings cardi for arms up swaddling The 2.5 TOG Cocoon Swaddle Sack is a zip-up, TOG-rated swaddle designed to make safe sleep simple for new parents from birth. The multi-functional Cocoon has you covered no matter your newborn's preference for sleep; arms-in, arms-out, or hands up* *Hands-up mode possible when using in conjunction with a Butterfly Cardi, sold separately.