This is a pair of San Kanshion brand half pants for boys. The size is 90. The material is 100% cotton and has a sturdy feel, but it's also smooth, so I think it can be worn coolly even in midsummer. The color is a natural-toned border pattern, which I think will be easy to match with tops. The waist is only elastic, and the buttons are decorative, so it's easy to take on and off even during potty training.