Used a few times. No stains in the inside, small inside outside that I haven’t tried to get out. The Goyo is a durable backpack from Kipling crafted in nylon, perfectly sized to carry all your essentials WHY YOU'LL LOVE IT: a nylon bag is your go-to bag, ready for any day, any weather. It's lightweight, durable and water-resistant! • Small sized backpack; 10-3/4"W x 10-3/4"H 4-1/4 x"D (width is measured across the bottom of backpack) • Silhouette is based off 5'9" model • Dual carry handles; 33-3/4"L adjustable backpack straps • Zip closure • Silver-tone hardware, front drawstring pocket, back slip pocket • Interior zip pocket, slip pocket • Nylon • Spot Clean