You're looking at used Old Navy Active go dry size Medium 8 boys shorts.  Internal drawstring and elastic waistband, and 2 side pockets. Can't be sure but they feel like polyester, a smooth material.  They are a sort of heathered black and blue color, darker than the pictures show.  They are used but show little signs of wear besides maybe some threds and wrinkling.

Bid with confidence - I'm a 100% seller since 1999 for good reason!  Will ship for free within the US from a pet and smoke-free home.  Will ship via trackable USPS ground advantage.