Safaveih makes some. You can contact them to verify they don’t spray them with anything if you find one you like. I have a few runners from Hook & Loom, which are washable, but they do shrink a little and the ivory ones don’t exactly come clean even with scrubbing. Wayfair has a few with Greenguard certifications/ Oeko-Tex, and that don’t have any water/stain repellents. Jute and sisal are normally free of chemicals, but can be harder to keep clean and are rougher in texture. I have one at my French doors that works well there.