SwaddleDesigns Organic Transitional Swaddle Sack — Arms Up Sleeves, 3-6 Months, Soft Blue

Gentle transition for sleepy babies

The Organic Transitional Swaddle Sack from SwaddleDesigns is designed for the moment a baby is ready to transition from a full, arm-restricting swaddle. Crafted from 100% organic cotton and GOTS certified, this sleep sack offers a soft, breathable feel that drapes comfortably across tiny shoulders. The arms-up design uses 1/2-length sleeves with foldover mitten cuffs that can be opened or closed, helping your baby self-soothe while maintaining a secure, flexed arm position.

With a 0.5 TOG warmth level, it fits a wide range of nursery temperatures. In cooler rooms, layer with a bodysuit or a sleeveless wearable blanket to add warmth. The fabric’s natural stretch supports easy movement without feeling tight, and the sack is machine washable for simple care, making nightly routines smoother for you and calmer moments for baby.

What makes it stand out

• Arms Up design with 1/2-length sleeves and foldover mitten cuffs keeps little arms in a secure, flexed position while allowing self-soothing and exploration of hands.
• Two-way zipper with a zipper guard eases diaper changes from the bottom and dressing from the top, reducing fuss.
• Recognized by the International Hip Dysplasia Institute (IDHI) as Hip Healthy, offering a hip-friendly sleepwear option.
• Designed by a nurse, balancing practical care with baby-led sleep preferences. Foldover mitten cuffs can be worn open or closed for hand access or facial protection.
• 100% Organic Cotton, TOG 0.5, soft and breathable for a comfortable sleep surface. Size mapping helps you choose by weight: S 6-14 lbs, M 14-21 lbs, L 21-24 lbs.

Practical use and care

• Ideal for babies who sleep with arms up, are starting to roll, or enjoy hand-to-mouth soothing, and for those who outgrow traditional swaddles.
• The foldover cuffs offer flexibility: open for direct hand access, or closed to protect little faces from scratches.
• Layer with a bodysuit or a ZwZipMe Sleeping Sack in cooler temps for extra warmth.
• Care is straightforward: machine wash warm, tumble dry low; fabric holds its shape wash after wash.

With patents in multiple regions and a hip-friendly certification, this transitional sack blends safety cues with baby-led sleep preferences. It represents a practical, thoughtful option for families navigating the shift from full swaddling to a sleep sack, all while keeping comfort and breathable fabrics at the forefront.