SwaddleDesigns Transitional Swaddle Sack | Arms Up Half-Length Sleeves, Mitten Cuffs, 3-6 Months, Heathered Jadeite

Overview

The Transitional Swaddle Sack from SwaddleDesigns helps families ease baby from a traditional swaddle into a wearable blanket. With arms up half-length sleeves, foldover mitten cuffs, and a two-way zipper, it combines snug security with gradual freedom, supporting peaceful nights and everyday comfort.

Crafted in soft, 100% cotton with a gentle stretch, this sack features a TOG of 0.5 for breathable warmth. Designed by a nurse, it emphasizes practicality and baby-centered care, while patent-backed design details show a thoughtful approach to safe transitions.

Key design features

• TRANSITIONAL SWADDLE SACK promotes better sleep and safer sleep. Ideal for arms up sleepers, babies starting to roll, hands-to-mouth self soothing, and those who outgrow a traditional swaddle.
• LITTLE SLEEVES with BIG PURPOSE. Unique arms up 1/2-length sleeves with foldover mitten cuffs provide gentle suppression of Moro/Startle reflex, helping baby settle; sleeves also support repositioning if rolling occurs.
• HIP HEALTHY and parent-friendly. Crafted to be a safe transition rather than a tight wrap or loose sleeveless blanket, encouraging a natural, flexed position.
• DESIGNED BY A NURSE. Foldover mitten cuffs can be opened or closed to support self-soothing or protect little faces from scratches.
• Versatile Zipper System. 2-way zipper zips from top for easy loading and bottom for quick diaper changes, plus TOG 0.5 for everyday comfort.

Fit, care, and usage

Use weight to determine size: S 6–14 lb (0–3 months); M 14–21 lb (3–6 months); L 21–24 lb (6–9 months). The 0.7 TOG fabric is soft and breathable, ideal for varied room temperatures. Care is simple: machine wash warm and tumble dry low.

Why families choose this transition option

The arms up design with half-length sleeves is especially helpful for babies who prefer to sleep with arms raised, for babies who are starting to roll, or for those who tend to break out of traditional swaddles. The combination of secure snugness and flexible sleeves supports a comfortable transition with self-soothing opportunities.

Color and style

Heathered Jadeite offers a muted, cozy look that blends with nursery decor while preserving a soft, breathable feel during sleep.