Can be used from the newborn period! I used it for about 4 months, but I didn't use it that much because I was also using another baby carrier. There are no particular stains, and it's relatively clean. I cut off the long tag that was at the very back because it was in the way. The buckles and such are in good working order, and it can still be used! Please refrain from purchasing if you are sensitive to used items. No pets, no smokers. Retail price: ¥11000 Manufacturer: Baby Bjorn Product name: Baby Carrier Mini Color: Black Cotton 【Product Description】 This baby carrier allows even inexperienced parents to easily carry newborns. It features a "separate structure" to safely hold babies before they can support their own necks. It's a best-seller that has been loved for over 50 years. ⭐︎ Safe and close carry for newborns ⭐︎ Surprisingly easy to put on ⭐︎ Unique separate structure ⭐︎ Perfect for putting baby to sleep ⭐︎ Machine washable for cleanliness anytime ⭐︎ Scandinavian design that makes outings fun Age range: Newborn to approximately 12 months (height 53cm～, weight 3.2～11kg) Material: Main body: Cotton: 100% cotton (Inner cushion: Polyurethane foam) Safety standards: SG certified. Compliant with ASTM F2236, EN13209-2:2005 Care instructions: Machine wash in a net at up to 40°C Official HP: https://babybjorn.jp/product/baby-carrier-mini