The 3.5 TOG Cocoon Swaddle Bag is a zip-up, TOG-rated swaddle designed to make safe sleep simple for new parents from birth. Swaddle your baby safely and warmly with the award-winning and TOG-rated Cocoon Swaddle Bag, no matter their sleep style preference (arms-in, arms-out, or hands up*) or startle reflex strength. The innovative, world-first design was pioneered by ergoPouch and perfected since its launch in 2009 to be a safe, supportive, effective and warm swaddle for sleep. The organic stretchy cotton provides a firm fit to mimic the feel of the womb, and help contain their startle reflex. The shoulder studs allow you to transition to arms-out sleeping as their startle reflex fades.