This is MILLET's Drynamic underwear. The size is S-M. The color is light gray. It's made of stretchy material. It's a durable product, so I think there's almost no dirt or damage. I've only worn it about twice, and for a short time each time. It's made to fit snugly to the body with its stretchy construction, so I think you can use it all season. - Brand: Millet DRYNAMIC - Size: S-M