"25L/45L Heavy Duty Tactical Backpack for Men and Women - Versatile Outdoor and School Rucksack with Bottle Holder for Hiking and Daily Use"

It sounds like you're describing a versatile tactical backpack. Here's a more detailed description:

25L/45L Tactical Backpack

Design: Durable and rugged, suitable for both men and women.
Capacity: Available in two sizes - 25 liters and 45 liters, providing options for different carrying needs.
Material: Constructed from high-density, water-resistant fabric for durability in outdoor conditions.
Compartments: Multiple compartments, including a spacious main compartment, front pockets, and inner pockets for organized storage.
Bottle Holder: Equipped with a side bottle holder, designed to fit most standard-sized water bottles.
Comfort: Padded shoulder straps and a ventilated back panel for comfortable carrying over long periods.
MOLLE System: Includes a MOLLE (Modular Lightweight Load-carrying Equipment) system for attaching additional gear.
Zippers: Heavy-duty zippers designed for durability and ease of use.
Use Cases: Ideal for hiking, camping, school, or daily commuting.