Woolino Merino Wool & Organic Cotton Baby Sleeping Bag — 4-Season Sleep Sack (0-36m)

Meet the Woolino Merino Wool and Organic Cotton Baby Sleeping Bag, a breathable, temperature-regulating sleep sack designed for comfort across the year. Featuring a silky-soft Australian merino wool lining and a 100% GOTS-certified organic cotton outer, this sleep bag aims to provide a balanced, cozy environment as your child grows from infancy to toddlerhood. It is suitable for room temperatures around 63–75°F (17–24°C) and is crafted to support a calm, uninterrupted night for many families.

Why merino matters for little ones

Merino fibers are naturally breathable and moisture-managing, helping babies feel warm when it’s cool and cool when it’s warm. This responsive fabric is gentle on sensitive skin, offers durability for daily use, and dries relatively quickly after care. The combination with organic cotton adds an all-natural outer layer that suits active play and snuggly sleeps alike.

All-season versatility you can grow with

Three standard sizes (0–6 months, 6–18 months, 18–36 months) provide a long-lasting option, potentially reducing the need for multiple sleep sacks. The multi-season design emphasizes a comfortable, safe sleep environment without relying on loose blankets or extra layers.

• Temperature-regulating merino wool lining for year-round comfort
• All-natural GOTS-certified organic cotton outer for softness and durability
• Two-way zipper that opens from top and bottom for easy dressing and diaper changes
• Open-flat design with zipper guards to protect delicate skin
• Nursery thermometer and dressing guide included to help with room setup
• Woolmark-certified merino and OEKO-TEX STANDARD 100 safety tested
• Machine washable and tumble-dry friendly; packaging in a biodegradable gift box

Smart design with safety in mind

Beyond comfort, this sleep bag emphasizes practicality and care. The two-way zipper allows quick outfit changes without fully undressing, while the zipper guards help prevent irritation. The included nursery thermometer provides a simple dressing guide, supporting confidence for new parents.

Care, packaging, and sustainability

Like many Woolino products, this sleep bag is designed for easy care: machine washable and suitable for tumble drying. It arrives in a 100% biodegradable gift box, aligning with thoughtful, low-waste presentation for gifting or personal use.

With safety certifications and a reputation for quality since 2010, Woolino offers a practical, premium option for families seeking natural materials and thoughtful design.