Under-promise and over-deliver - the Fastpack 15 actually holds over 20 liters. With large front storage for water, phone, maps, glasses, or food, sliding rail sternum straps. This pack also has designated no-bounce laptop pocket with cord storage securely inside and MonoRip Mesh is very strong, but extremely breathable.

You can run with this, hike, bike, or ski...boundaries don't matter with the Fastpack 25. It's got Large front storage for water, phone, maps, glasses, or food, sliding rail sternum straps andTrekking pole loops. With waterproof zipper, the MonoRip Mesh is very strong, but extremely breathable, patented lnfiKnit mesh is an entirely seamless back-panel and shoulder-strap system to prevent abrasion and discomfort, daisy chains for securing extra gear and two large side pockets for larger water vessels.