Woolino 4-Season Merino Wool Sleep Sack – Organic Cotton, Two-Way Zipper, Stars (18-36 Months)

All-Season Comfort for Baby and Toddler

Meet the Woolino 4-Season Classic Sleep Sack, crafted for little ones aged 18–36 months. By pairing a soft merino wool lining with an organic cotton outer, this sleep sack offers a cozy, breathable layer that adapts as seasons change. Instead of loose blankets, it helps maintain a stable microclimate so bedtime remains calm and comforting for both child and caregiver.

Premium Fabrics for Gentle Care

• 100% Australian merino wool lining delivers a luxuriously soft touch and natural breathability.
• 100% GOTS certified organic cotton outer shell adds durability with a gentle feel against delicate skin.
• Machine-washable construction supports busy families and frequent diaper changes.

Seasonal Versatility and Smart Design

• All four seasons: merino wool helps retain warmth in cooler rooms and remains breathable when it’s warmer.
• No-snap design with a two-way zipper that unzips from top and bottom for easy dressing and quick diaper changes.
• Opens flat for simple changes, with zipper guards to protect delicate skin; generously sized for growing kids.

Also included are a nursery thermometer and a dressing guide to help you tailor comfort for your child’s sleep environment. This sleep sack is designed to replace loose blankets, offering a streamlined bedtime routine as your child grows.

Quality You Can Trust

Woolino has established itself as a trusted US company since 2010, offering responsive customer service and an industry-leading warranty. The Stars print adds a classic, cozy touch that works well at bedtime or while traveling.

Care & Longevity

• Machine-washable design supports easy cleaning between sleeps.
• With proper care, softness and color are preserved for longer use across seasons.