The waist has elastic and an inner drawstring. The color is a muted blue, perhaps? It also has side pockets, making it very functional. I believe the size is men's S. My son has the same pants in black and seems to really like them. The silhouette is also cute and stylish. The fabric is a bit thick and sturdy, and while the color expression changes slightly with each wash, that's also a good thing! - Brand: KELTY - Color: Blue系 - Features: Elastic waist - Pockets: Side pockets included