SwaddleDesigns Transitional Swaddle Sack – Arms Up Half-Length Sleeves & Mitten Cuffs, 0.7 TOG, 3–6 mo, Watercolor Sunny Days

Transition gently from a traditional swaddle with the SwaddleDesigns Transitional Swaddle Sack. The arms-up design invites natural self-soothing, while the 1/2-length sleeves with foldover cuffs provide snugness and flexibility for growing babies. The Watercolor Sunny Days print adds a soft, calming touch to the nursery, making the transition feel gentle from day one. If your little one starts to roll, the sleeves offer room to lift the head and torso to access air, supporting a calmer sleep transition.

Who this is for

• Babies who sleep best with arms up and bent elbows
• Babies beginning to roll or practicing rolling over
• Babies who break out of a traditional tight swaddle but still need cozy coverage

This wearable blanket is designed to adapt as your baby grows, combining a snug feel with enough room for safe movement. The design incorporates thoughtful nursing insight, pairing practical features with a soft, breathable fabric you can trust for everyday wear.

Key design details

• Arms-up sleeves with foldover mitten cuffs that can be opened or closed for self-soothing or protection from scratches
• 1/2-length sleeves that help keep arms close to the body without restricting breathability
• 2-way zipper with top and bottom pulls for effortless placement and quick diaper changes
• 100% cotton knit offers a soft, stretchy feel that stays comfortable through multiple washes
• Weight-based sizes (S 6–14 lb, M 14–21 lb, L 21–24 lb) for a snug, hip-healthy fit

How to use

Lay baby into the sack, align the sleeves, and adjust the cuffs to your preferred level of coverage. Use the top zipper for easy initial placement and the bottom zipper for convenient diaper changes. If baby rolls, allow a bit of shoulder and arm movement to help them breathe and settle.

Care and durability

Crafted from 100% cotton with TOG 0.7 for year-round comfort. Machine wash warm, tumble dry low. Designed to withstand daily use and frequent washing, with US patents 11,812,795 and D833,613 and corresponding international patents.

Whether you are starting sleep training or seeking a transitional layer between swaddle and sleep sack, this product offers a flexible, comforting option designed to grow with your baby.