The reason to move from twenty to twenty-four liters should be tangible. An additional warm layer, a larger lunch or equipment for a longer outing can justify the Gregory Nano 24L without turning it into your main luggage.
The extra space has a daily purpose
This offer names the 24L Nano in Moab Tan. It provides a middle option for travelers who find a small sightseeing bag restrictive but do not need the larger clothing capacity of the Border 30 or Border 40.
A sensible load might combine weather protection, water and the items needed during a full day away from accommodation. Build that load around the most rigid object first. Filling the remaining gaps with soft clothing is more efficient than discovering at the end that a food container has nowhere to sit.
Reach the main load without disturbing everything
Gregory’s current Nano 24 page describes a U-shaped main zipper, front storage, side bottle pockets and a separate tablet-or-hydration area. The broad opening can be useful for seeing the main load, while small essentials can stay grouped away from clothing.
Keep in mind that an equipment attachment point does not establish airline permission to bring the attached item. If walking equipment is part of a flying itinerary, plan the transport rules separately from whether the bag has somewhere to fasten it.
When the larger Nano is unnecessary
For errands requiring little beyond a phone, wallet and light layer, 24L may be more bag than you need. It is also still a daypack-sized starting point for clothing-heavy travel. If the backpack must hold every garment for the trip, make a complete trial load rather than expecting the extra four liters over Nano 20 to solve a fundamentally larger packing requirement.
