Knirose Baby Sleep Sack Swaddle 0-3 Months — Arms Up, 2-Pack Cotton Wearable Sack

Meet the Knirose Arms Up Sleep Sack: calm, cozy sleep for newborns

Designed for newborns 0–3 months, the Knirose Sleep Sack Swaddle comes in a convenient 2-pack. Its Arms Up design mirrors a natural sleeping posture many babies instinctively favor, while still leaving room for gentle movement. The result is a secure, womb-like feel that supports your baby through the night without being restrictive.

What makes this sleep sack special

Parents often seek sleep solutions that feel familiar and comforting. This swaddle delivers with a snug wrap and stretchy fabric that glides with each breeze of your baby’s limbs. It also grows with your child, offering transitions from arms-in to arms-out wear as needed, so you don’t have to start over with a new style when baby grows.

• Arms Up design aligns with natural sleep posture and helps minimize startle disruptions.
• Snug fit uses 95% cotton and 5% elastane with a TOG rating of 0.8 for year-round comfort.
• Dual 2-way zipper from side to bottom enables quick, quiet diaper changes with minimal disturbance.
• Multipurpose design supports growth and transitions, from swaddled arms to arms-free wear.
• Roomy enough for kicking legs while keeping baby securely wrapped.

The fabric is soft and breathable, offering a familiar, gentle stretch that moves with your baby. The zippers are thoughtfully hidden to protect delicate skin, and the overall construction emphasizes practicality for everyday use—ideal for busy nights and busy days alike.

How to use, wear, and care

Place your baby on their back inside the sack, with arms naturally tucked in the arms-up position for sleep. If your baby begins to roll or prefers more arm freedom, switch to arms-out wear. For diaper changes, use the side-to-bottom zipper to access the diaper with minimal wake-ups. This slept-friendly garment is machine washable and built for repeated use.

What you receive: two sleep sacks crafted from a soft cotton-elastane blend designed for comfort and durability during the newborn months.