Woolino Merino Wool + Organic Cotton Baby Sleep Bag — 4 Season (6-18 Months)

All-season comfort for baby sleep

Meet the Woolino Merino Wool and Organic Cotton Baby Sleep Bag — a versatile sleep sack designed to simplify nightly routines across the year. The ultra-soft merino wool lining rests against delicate skin with breathable warmth, while the outer layer is 100% organic cotton, offering a gentle texture and lasting durability. This natural fiber blend helps balance warmth and breathability as your child grows, providing a snug, comfortable sleep environment without bulky blankets.

Why this sleep bag stands out

From bedtime rituals to late-night diaper changes, this sleep sack adapts to your family’s needs. The 4-season design leverages merino wool's temperature-regulating properties to keep baby warm in cooler rooms and cool when the night heats up. The classic no-snap design with a two-way zipper ensures easy dressing and quick diaper changes, while zipper guards protect delicate skin. Use over regular sleepwear to reduce the need for loose blankets, and enjoy the peace of mind that comes with quality fabrics and thoughtful design.

• Premium fabrics: 100% Australian merino wool lining and 100% GOTS-certified organic cotton outer.
• All-season warmth: merino wool naturally adapts to temperature to keep baby comfortable.
• Easy care: machine-washable design built for daily use.
• Safety and convenience: no-snap design with a two-way zipper and zipper guards for skin protection.
• Generous sizing: roomy cut that opens flat for easy dressing and quick diaper changes.
• Practical extras: nursery thermometer and dressing guide included to help bedtime routines.

Use this sleep bag in place of blankets across all seasons. Dress your baby in light sleepwear for warmer nights and add layers when the room cools. The two-way zipper opens from top and bottom for faster diaper changes without disturbing your baby. The sleep bag’s sturdy construction and machine-washable fabric help busy families stay on top of laundry while preserving softness and shape over time.

Quality and confidence you can feel

Woolino has offered merino baby essentials since 2010, pairing US-based customer service with a leading warranty. This sleep bag blends premium materials with thoughtful design to support calm nights and a serene nursery environment.

Who is this for?

Designed for babies and toddlers aged 6–18 months, the sleep bag is ideal for families seeking a warm, breathable sleep solution that works across seasons and grows with the child.