SwaddleDesigns Transitional Swaddle Sack: Arms Up Half-Length Sleeves, 3-6 Months, 14-21 lb, Tiny Arrows

Transition with ease: SwaddleDesigns Transitional Swaddle Sack

The Transitional Swaddle Sack is designed to help families shift from a traditional wrap to a wearable blanket while keeping baby comfortable, secure, and cozy. Its arms up design suits infants who sleep better with arms raised and supports a gradual transition as little ones begin to roll. Crafted from 100% cotton with a light TOG, it balances warmth with breathability for peaceful nights and calm days.

Key benefits you may notice

• The TRANSITIONAL SWADDLE SACK encourages self soothing and aims for safer, more settled sleep. Ideal for babies who prefer arms up, are starting to roll, or break out of traditional swaddles.
• LITTLE SLEEVES WITH BIG PURPOSE. Arms Up sleeves with 1/2 length and foldover mitten cuffs closed provide partial suppression of the Startle Reflex and help keep the torso and head flexed for a snug fit. If your baby rolls onto the tummy, arms can help lift to access air for easier breathing.
• A measured step from tight swaddling to wearable comfort. The sack offers snug security without being a tight wrap, supporting a natural hip position during growth phases.
• FOLDOVER MITTEN CUFFS MAY BE WORN OPEN OR CLOSED. Caregivers can open one or both cuffs to allow hand sucking for soothing or close them to shield little faces from scratches.
• 2-WAY ZIPPER DESIGN. A convenient zipper runs from top to bottom to simplify getting baby in and out for diaper changes without excessive disturbance.

Real-life use and fit

Designed for babies in the transition phase, this sack helps those who love sleeping with arms up or who are starting to roll. The unique half length sleeves stay close to the body for a snug feel while remaining flexible enough to assist with air access if needed. The hip healthy design keeps little legs in a natural position for comfort and growth.

• Great for babies who wake due to the Startle Reflex or who break out of standard swaddles, offering a familiar feel with added freedom.
• Ideal for infants in the 3–6 month window, typically weighing 14–21 lb, with a weight-based size medium recommended.
• Easy care: machine wash warm and tumble dry low keeps life offline while preserving fabric feel.

Materials, design heritage and care

Designed by a nurse, SwaddleDesigns brings practical, safety-minded details to nurseries. The Transitional Swaddle Sack uses soft 100% cotton knit with a lightweight TOG around 0.5, delivering breathable warmth for comfortable sleep. The product carries US patents and international protections, underscoring a thoughtful approach to wearable baby sleepwear. Tiny Arrows print provides a gentle, modern accent that blends with everyday nursery décor.