SPGOOD Bike Backpack 20L/25L/30L (9 colors) - Waterproof Ultralight - for Women & Men Multifunctional - with Rain Cover/Helmet Cover Backpacks MTB Mountain Bike (Black, 25L)
"Drink system compatibility, a hidden hydration system on the shoulder strap for water bladder (bladder not included). You can drink water while cycling. The backpack also includes front pockets, side pockets, phone pockets, rain cover, helmet cover, and a multifunctional design to meet your various requirements."
