SwaddleDesigns Transitional Swaddle Sack – Arms-Up Half-Length Sleeves, Mitten Cuffs | Medium (3–6 Mo) 14–21 lbs Heathered Peach Blush

The SwaddleDesigns Transitional Swaddle Sack is designed to make the move from a traditional swaddle easier, safer, and more comfortable for both baby and caregiver. The arms-up configuration invites gentle arm movements that many little ones associate with self-soothing, while the 1/2-length sleeves with foldover mitten cuffs offer a snug, flexible wrap that adapts as baby grows. Because the design accommodates a baby who may roll, arms can be used to reposition and breathe freely—an important detail for transitioning sleepwear.

Key design elements work together to support a calm sleep environment. The half-length sleeves keep arms close to the body for swaddle snugness, yet remain flexible enough to allow movement. The foldover mitten cuffs can be worn open or closed, giving caregivers options to encourage self-soothing or protect delicate hands from facial scratches. A helpful two-way zipper zips from the top for easy placement and from the bottom for quick diaper changes, reducing disturbance during late-night routine.

Ideal for babies who prefer to sleep with arms up, those just starting to rollover, or little ones who tend to break out of a traditional swaddle. The wearable blanket is not a tight wrap, and its snug fit supports a natural flexed position while giving space for breath and movement. The product is soft to the touch, with a cotton knit that feels gentle against the skin and a colorway described as Heathered Peach Blush with Polka Dot Trim for a calm, comforting look in the nursery.

Designed by a nurse and protected by a US patent (D833,613) with corresponding patents in EU, UK, China, Japan, and Korea, this Transitional Swaddle Sack reflects thoughtful safety engineering and years of practical care experience. Sizes include Small (6–14 lbs, 0–3 mo), Medium (14–21 lbs, 3–6 mo), and Large (21–24 lbs, 6–9 mo), so caregivers can select the best fit as their baby grows. The fabric is a soft cotton knit described as gentle yet supportive, and the design emphasizes ease of use for caregivers who value a smooth transition away from traditional swaddling.

• Arms-up design with half-length sleeves and closed mitten cuffs promotes arm flex near the body for snug, self-soothing opportunities.
• Foldover mitten cuffs can be opened or closed to balance self-soothing with facial protection from scratches.
• Two-way zipper system zips from top for easy baby placement and from bottom for quick diaper changes.
• Soft cotton knit provides a gentle touch and a snug yet comfortable fit that grows with baby.
• US patent and nurse-designed construction reflect thoughtful safety engineering for transition sleepwear.

• Best for babies who sleep with arms up and prefer a more flexible wrap.
• Helpful for babies starting to rollover or transitioning away from a traditional swaddle.
• Ideal for little ones who break out of standard swaddles but still need secure, cozy coverage.

Care and sizing notes: Small 6–14 lbs (0–3 mo); Medium 14–21 lbs (3–6 mo); Large 21–24 lbs (6–9 mo). The design’s snug fit aims to support a comfortable, flexed position while providing a gentle, breathable wrap for sleep transitions.