Eco-friendly backpack, made of 100% Polyester made from 100% recycled plastic bottles: Repreve Backpack with 2 large compartments Interior compartment for tablet or laptop Holds a 15 computer Multifunction pockets inside a compartment Front pocket with zipper Padded back panel Padded and adjustable shoulder straps Bottle water pocket Adjustable waist strap Carry handle Robust bottom 100% Polyester Capacity: 18L Machine wash in cold water Hang to dry(Or dry clean) Features Eco-friendly backpack, made of 100% Polyester made from 100% recycled plastic bottles: Repreve Backpack with 2 large compartments Interior compartment for tablet or laptop Holds a 15 computer Multifunction pockets inside a compartment Front pocket with zipper Padded back panel Padded and adjustable shoulder straps Adjustable waist strap Carry handle Robust bottom Materials 100% Polyester Specifications Capacity: 18L Care Machine wash in cold water Hang to dry(Or dry clean)

Inventory includes a diverse, yet curated selection of menswear and womenswear basics, outerwear, shoes, decorative home goods, and accessories with an emphasis on modern wardrobe staples, everyday silhouet
And sorry for neglecting your question for so long
I tried again on a virtually empty spool to see if that's where the claimed figure comes from and I got 19.8kg (~44lbs)
Hydration packs do generally have space for a few extras and are often used by runners and cyclists
These were the sort of views that end up on Instagram feeds the greatest hits of a hike