Thank you for viewing! ♡ This is a handmade item ♡ I make each item with care, but they are not perfect. Please refrain from purchasing if you are concerned about minor details. Thank you for your understanding. Materials: Outer: 100% cotton, "Clenzy" fabric, Oxford fabric with a denim pattern (softer feel than denim) Inner: 100% cotton, bleached Size: Approximately 11.5 x 19 cm ★ Suitable for around third grade of elementary school, but there may be individual differences, so please check the size. ⭐️ The vertical center is stitched together with two layers to make it less likely to touch the mouth and easier to breathe. ⭐️ I have applied stitching as much as possible to make it durable, which should prevent shape distortion after washing and make it easy to care for.