{"product_id":"arms-up-transition-sleep-sack-anti-startle-swaddle","title":"Arms-Up Transition Sleep Sack","description":"\u003ch3\u003eFinally, a Swaddle That Grows With Your Baby\u003c\/h3\u003e\u003cp\u003eThe startle (Moro) reflex is a normal newborn survival instinct — but it's also the reason so many babies jolt themselves awake mid-nap. Our Arms-Up Transition Sleep Sack is built around a simple idea used by sleep consultants everywhere: instead of pinning your baby's arms down, let them stay up, near the face, where babies naturally like them.\u003c\/p\u003e\u003cp\u003eTwo soft fabric \"wings\" hold the arms in a gentle raised position, so your little one can suck on their fists, touch their own cheek, and self-soothe back to sleep — without the flailing that comes from a fully loose sleep sack.\u003c\/p\u003e\u003ch4\u003eWhy Parents Reach for the Arms-Up Style\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalms the startle reflex\u003c\/strong\u003e without restricting the arms completely\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports self-soothing\u003c\/strong\u003e — hands stay up near the face\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA real transition tool\u003c\/strong\u003e — the bridge stage between fully wrapped and arms-free, recommended once baby starts showing rolling attempts (usually 3–6 months)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasier nights, easier changes\u003c\/strong\u003e — a full-length front zip means diaper changes don't turn into a wake-up party\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSoft, Breathable, All-Season Comfort\u003c\/h4\u003e\u003cp\u003eMade from combed cotton for a soft, breathable next-to-skin feel. Rated by the manufacturer at \u003cstrong\u003e1.0 TOG\u003c\/strong\u003e, comfortable in room temperatures of roughly \u003cstrong\u003e15–25°C (59–77°F)\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eThe \"Class A\" combed cotton claim and TOG rating are manufacturer-stated specs, not independently lab-verified by us. Always follow current pediatric safe-sleep guidance and stop any arms-up product once baby shows signs of rolling.\u003c\/em\u003e\u003c\/p\u003e","brand":"mamamunchkin","offers":[{"title":"0–9 Months","offer_id":52926186815669,"sku":null,"price":34.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1022\/8305\/1189\/files\/Gemini_Generated_Image_9d1ahm9d1ahm9d1a_1.png?v=1785775754","url":"https:\/\/mamamunchkin.com\/products\/arms-up-transition-sleep-sack-anti-startle-swaddle","provider":"Mamamunchkin ","version":"1.0","type":"link"}