I used this for three months, from one to four months old. I'm selling it because I switched to a second baby carrier! The drool cover, waist pouch, and storage bag are unused. There is a small stain, although it's not very noticeable, so please check it (photo 4). I purchased it in July 2024, so it's still within the one-year warranty period. Please comment if you have any questions! *I am not considering price negotiations, so please refrain from comments asking for a discount. 〈Age Range for Use〉 ■ Facing-in carry (with infant booster): Under 4 months (before neck control) Weight 3.5～7kg ■ Facing-in carry: 4 months and older (after neck control) Weight 7～13.5kg ■ Facing-out carry: 6 months and older Weight 9～13.5kg ■ Back carry: 9 months and older Weight 11～16kg 〈Size/cm〉 W:33 D:35 H:48 〈Weight/kg〉 ■ 1.0kg (excluding infant booster, head support, drool cover, waist pocket, and storage bag) 〈Color〉 Denim Thank you for looking.