Amazon.com | UEASE Mesh Backpack Heavy Duty for School, 24L Large Mesh Bookbag for Adults, See Through Black Mesh School Bag Lightweight with Comfort Padded Straps for Work Swimming Beach Fitness Sport (
Nike Brasilia 9.5 Training Backpack (Medium, 24L). Nike.com
Columbia Trek™ 24L Backpack | Columbia Sportswear
24L waterproof backpack which can be stored in pocket size "Sea to Sky Pack" - GIGAZINE