SwaddleDesigns Transitional Swaddle Sack - Arm-Up Sleeves, 0-3M, Heathered Peach Blush

Transition with ease from traditional swaddles to a wearable blanket

The Transitional Swaddle Sack is designed to support a calm, secure shift for newborn sleep. Built for babies who prefer arms up, are starting to roll, or tend to break out of classic swaddles, this sack blends snug comfort with room to move. Crafted from soft, breathable 100% cotton knit and rated TOG 0.5, it provides a balanced, gentle warmth without overheating. Designed by a nurse and protected by US patents 11,812,795 and D833,613 (with patents in multiple regions), this wearable blanket emphasizes practicality and peace of mind for caregivers and babies alike.

Key benefits at a glance

• The arms-up style supports self-soothing and a calmer sleep routine for many newborns.
• 1/2-length sleeves with foldover mitten cuffs offer partial Startle Reflex suppression while keeping arms close to the body.
• If baby rolls, the sleeves provide a way to lift the torso and head, helping with air access and visibility.
• Not a tight wrap; the design aims for a snug fit that still respects a natural hip position for comfort and growth.

Practical design elements that make life easier

• Foldover mitten cuffs can be worn open or closed, enabling self-soothing or protection from facial scratches as needed.
• Two-way zipper with two pulls supports easy front placement and quick diaper changes from the bottom.
• 100% cotton fabric offers softness and breathability; TOG 0.5 is suitable for warmer nights or layered sleep setups.
• Weight-based sizing helps you choose the right fit: S 6-14 lbs (0-3 mo); M 14-21 lbs (3-6 mo); L 21-24 lbs (6-9 mo).

Usage tips and real-world scenarios

The Transitional Swaddle Sack is ideal for babies who like to sleep with arms up, those nearing rolling milestones, or little ones who outgrow traditional swaddles. It blends the security of a swaddle with the flexibility of a wearable blanket, supporting a natural sleep rhythm while allowing repeated diaper changes without fully undressing baby.

For color and care, the Heathered Peach Blush finish brings a soft, calming look to nursery spaces. Care is straightforward: machine wash warm and tumble dry low to maintain the fabric’s softness and shape over time. This practical, nurse-designed design offers a thoughtful option for families navigating the transition from swaddle to wearable blanket.