Woolino Merino Sleep Bag - 4-Season Baby Sleep Sack (6-18M) Butterfly

All-Season Comfort in a Single Sleep Bag

The Woolino Merino Sleep Bag combines a sumptuous 100% Australian merino wool lining with a 100% GOTS-certified organic cotton outer layer. This natural pairing offers a soft, breathable touch against your baby’s skin while helping regulate warmth across the year. The result is a cozy sleeping environment that supports calmer nights for both baby and caregivers, without relying on loose blankets.

Designed for real-life routines, this sleep sack adapts to cooler nights and warmer days alike. The merino wool interior traps warmth when temperatures dip, while its breathability helps prevent overheating when the room heats up. With its classic no-snap silhouette, the bag stays comfortable over layers and still promotes easy mobility for curious babies as they grow.

Thoughtful Design for Busy Parents

Every detail serves a practical purpose. The two-way zipper unzips from the top or bottom, making swift diaper changes and dressing changes possible without waking your little one. The zipper guards protect delicate skin, while the sleep bag can open flat, simplifying dressing and nighttime transitions. Generously sized, it accommodates growth and layering without feeling restrictive.

In the box, you’ll find more than just a sleep sack. A nursery thermometer and dressing guide are included to help you monitor comfort levels and plan outfits across seasons. The result is a simple, trustworthy setup that fits into your nightly routine with minimal fuss.

Durable, Easy to Care For

Maintenance is straightforward: the sleep bag is machine-washable, keeping maintenance simple for busy households. Woolino stands behind its products with US-based customer support and an industry-leading warranty, underscoring a commitment to quality and peace of mind for your family.

A Quick Snapshot of Benefits

• Natural warmth and breathability from 100% Australian merino wool lining
• Soft, durable outer shell made from 100% GOTS-certified organic cotton
• 4-season temperature comfort helps keep baby comfortable year-round
• Two-way zipper for convenient dressing and diaper changes
• Zipper guards protect delicate skin during handling
• Opens flat for easy layering and dressing

• Generous sizing designed for 6-18 months with room to grow
• Machine-washable for quick, simple cleaning
• Includes a nursery thermometer and dressing guide for quick reference
• US-based support and warranty from Woolino, a trusted brand since 2010

With its Butterfly design, this sleep bag blends comfort with a touch of whimsy, making bedtime a calmer, more predictable routine for your baby and the adults who care for them. While individual results vary, the combination of natural fibers, smart design, and thoughtful extras positions the Woolino Sleep Bag as a practical option worth considering for families seeking a reliable, season-spanning sleep solution.