lotus4This is my 5th f-stop backpack, I have a 70-liter shuka, I have a 50-liter Tilopa, I have two 37-liter Ajnas, and now the new 28-liter Lotus4 Core, and for a long time I had been talking to f-stopLotus 4 CORE Pack and Shallow Medium Insert Bundle Narrowing to a 28 liter footprint, the Lotus 4 CORE stakes entry into the f-stop system, providing essential carry features.