BRAND NEW Rampage mini-backpack, black - idk why it looks like a wavy design!!

BRAND NEW Rampage mini-backpack, black. Idk why the photos make it look like there’s a wavy design; it’s the waterproof fabric I think!! It just looks black if you’re looking at it not through a camera! Never used! Was a gift that I don’t need as I already have several mini backpacks!! No use or blemishes! I hope it finds a good home :)