# Woolino 4 Season Ultimate Baby Sleep Bag

> Universal-fit merino wool sleep sack with GOTS organic cotton outer, OEKO-TEX Standard 100, Woolmark, and RWS certified. Thermoregulates from 63–75°F. One size fits 2 months through 2 years.

- Brand: [Woolino](https://nontoxicnook.com/brands/woolino)
- Price tier: $$$
- Canonical: https://nontoxicnook.com/products/woolino-4-season-ultimate-baby-sleep-bag

## Why we chose it

GOTS organic cotton outer with 100% RWS merino wool fill — the only sleep sack here with Woolmark, RWS, and OEKO-TEX Standard 100 simultaneously. Thermoregulates from 63–75°F. One size, 2 months to 2 years, changes the per-year cost significantly.

## Certifications

- GOTS Certified
- OEKO-TEX Standard 100
- Woolmark
- RWS Certified

## Specs

- material: 100% merino wool fill; 100% GOTS organic cotton outer
- fabric: Knit merino wool interior; woven cotton outer
- certifications-detail: GOTS, OEKO-TEX Standard 100, Woolmark, RWS (Responsible Wool Standard)
- size: Universal: 2 months–2 years
- dimensions: One size: 6–18 lb
- tog: All-season (63–75°F thermoregulation)
- made-in: Not disclosed
- care: Machine washable, cold, gentle cycle
- price-range: $109
- source:gots: https://www.woolino.com/pages/certifications
- source:oeko-tex-100: https://www.woolino.com/pages/certifications
- source:woolmark: https://www.woolino.com/pages/certifications
- source:rws: https://www.woolino.com/pages/certifications
- image:source-url: https://www.woolino.com/products/4-season-ultimate-baby-sleep-bag
- image:credit: Woolino, used with permission

## Where to buy

- [Amazon](https://www.amazon.com/dp/B018HV3EOC)
- [Woolino](https://www.woolino.com/products/4-season-ultimate-baby-sleep-bag-merino-wool-2-months-2-years-sage)

Prices are deliberately omitted from this mirror — they go stale. Current prices and stock: https://nontoxicnook.com/products/woolino-4-season-ultimate-baby-sleep-bag

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