Knirose Premium Soft Cotton Arms-Up Swaddle Sleep Sack - 2-Pack (6-12 Months) | 3-Way Transitions

Natural Sleep Fit for Babies: Knirose Arms-Up Swaddle Sleep Sack

Designed around a baby’s instinctive posture, the Knirose Arms-Up Swaddle Sleep Sack embraces your little one in a snug, breathable layer that moves with every twist and turn. Many babies naturally sleep with their arms raised, and this design mirrors that position to provide comfort while gently soothing the Moro reflex. The result is a secure, womb-like feel that can help your baby ease into longer spellsof sleep without being forced into a rigid position.

Top benefits at a glance

• Arms-Up design supports a familiar sleeping posture, which may help reduce startle awakenings.
• Two-way zipper enables quick diaper changes without fully waking your baby.
• 3-way transitions let you choose arms in, arms out, or arms-free as your baby grows.
• Premium materials (95% cotton, 5% elastane) with a 4-way stretch fabric for a soft, flexible feel.
• TOG 0.8 offers year-round comfort in temperate climates without overheating.

Everyday use, simplified

With a snug, secure feel, this sleep sack creates a familiar sense of safety similar to being held. The design accommodates active sleepers, leaving room for kicking and shoulder-to-knee movement while maintaining a calm sleeping surface. The fabric’s gentle elasticity helps the garment move with your baby’s body, reducing tugging and fussiness during the night. Since this is a 2-pack, you’ll have a spare ready for evenings when laundry is delayed or for travel preparations.

Growing with your baby

The swaddle evolves with your newborn through infancy, transitioning seamlessly to arms-out or arms-free configurations as your little one grows. The generous fit supports rolling and head-raising when needed, while still keeping the core snug for safety. Sized for 6–12 months, it provides versatile coverage and easy dressing, helping you navigate milestone changes without swapping entire sleep wardrobes.

Materials that feel good against delicate skin

• 95% cotton, 5% elastane blend delivers a soft, breathable touch with gentle stretch.
• 4-way stretch fabric supports natural movement and a secure, snug fit.
• TOG 0.8 rating is designed for year-round comfort in typical climates.