CosyDiary Merino Wool & Organic Cotton Sleep Sack | 2-24 Months, 2-Way Zipper

Year-Round Comfort for Growing Babies

Meet the CosyDiary Merino Wool & Organic Cotton Sleep Sack, designed for babies from 2 months up to 24 months. The inner layer uses 100% Australian Merino wool for a soft, gentle touch and warmth, while the outer shell is crafted from 100% organic cotton. This natural pairing delivers cozy comfort without synthetic fills, ideal for sensitive skin and everyday wear.

Natural Materials You Can Trust

Without polyester or harsh chemicals, this sleep sack emphasizes simple, breathable fibers that feel kind to delicate skin. Merino wool naturally regulates moisture and temperature, while organic cotton provides a smooth, breathable outer layer that stays comfortable through the night.

• 100% natural fibers with no synthetic fills
• Gentle on sensitive skin, free from irritants
• No polyester or synthetic additives

Seasonal Comfort: Temperature Regulation

The Merino wool fibers help maintain a comfortable microclimate, staying warm when it’s cool and breathable when it’s warmer. This natural regulation supports consistent sleep across different seasons and room conditions.

Grow-With-Baby Design

The universal size is built to cover roughly 2 months to 24 months, adapting as your baby grows. Under-arm snaps offer a better fit for changing body shapes, while a roomy hip area supports natural movement and hip health during sleep. The design also facilitates transitions between crib, stroller, and other resting spots.

• Universal sizing for extended use
• Under-arm snaps for adjustable fit

Practical, Parent-Friendly Details

Designed with busy family life in mind, this sleep sack features double shoulder snaps and a two-way zipper for easy dressing and quick diaper changes. A closable seat-belt slot supports safe transfers between stroller, car seat, crib, or bouncer, keeping baby cozy and secure during routine moments.

Safety Standards and Everyday Comfort

Aligned with US safety standards for infant sleepwear, the sleep sack offers flexible, comfortable use while maintaining thoughtful design details. Use it as part of your baby’s sleep routine according to comfort cues and safety guidelines.

Care and Longevity

To preserve the natural fibers, follow gentle care guidelines: wash on a delicate cycle and air dry flat. With proper care, the sleep sack can accompany your little one through multiple seasons, maintaining its soft touch and breathable feel.