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

Soft, natural comfort for every season

The CosyDiary Merino Wool & Organic Cotton Sleep Sack brings together a plush inner layer of 100% Australian Merino wool with a gentle outer shell of 100% organic cotton. This thoughtful pairing delivers ultra-soft comfort against a baby’s delicate skin, while providing warmth without bulk. With no polyester or synthetic fills, the design keeps fabrics breathable and free of common irritants, supporting a calm, cozy vibe during naps and night-time.

Built for year‑round use, the natural properties of Merino wool help regulate temperature and maintain a comfortable microclimate. In cooler nights, the inner wool provides a warm layer; on warmer evenings, its breathability helps prevent overheating. The result is a versatile sleep solution that adapts to your baby’s changing needs across seasons and environments.

Growth-friendly design and practical details

Size is truly universal, designed to accommodate babies from about 2 months up to around 2 years, so you don’t have to frequently switch sizes. The design features a thoughtful mix of elements to support quick dressing, easy diaper changes, and safe transfers between settings:

• Double shoulder snaps enable a snug, adjustable fit as baby grows.
• A robust two-way zipper simplifies dressing and night-time changes without disturbing sleep.
• Closable seat-belt slots make it easy to transfer between stroller, crib, or bouncer.
• Meets US safety standards for infant sleepwear, adding reassurance for families.

Care, durability, and everyday use

Designed for real-life routines, this sleep sack balances softness with durability. The organic cotton outer shell offers a soft touch for regular wear, while the Merino wool interior keeps its comforting feel after repeated washes (please follow care instructions to preserve softness and fit). The result is a practical, season-spanning sleeping solution that supports comfortable sleep without making promises, just possibilities for a restful night.