I think most people would be best served using a carry on size “travel pack” which is a cross between a backpack and soft-side luggage. Travel packs will often have light weight internal frames to make them easier to carry, handles on the top and side to carry as luggage, and backpack straps and maybe a waist strap that tuck away in case you need to check the bag through. I find most travel packs comfortable when carrying less than 10lbs and between 10-20lbs for a few hours. More weight for long durations requires a good suspension and an effective hip strap which is somewhat rare on travel packs.
I typically use a Tom Bihn Synapse-25 Backpack. It’s large enough for nearly every trip I have taken, while small enough that it fits under every seat I have used. It has never been viewed as “luggage” by transportation operators, so I have always been able to keep it with me. Wonderfully designed with just the right amount of organizational features that allow me to find my daily use items without having to “dig” through the bag. The laptop cache works brilliantly.
Every now and then I need to take more than 25L. Typically these are trips where I needed formal clothing, a laptop, and some sort of outdoor gear. In these cases I have used a Osprey TrailKit.
I am normally carrying less than 10lbs which allows me to comfortably carry this pack all day. When I bring my laptop my pack is more than 10lbs and I notice the weight on my shoulders after a couple of hours. It’s rare for me to bring my laptop on trips where I am carrying this pack for more than a few hours at a time.
Sometimes I combine travel (I carry my pack moderate distanced between hotels, hostels, and people’s homes) with multi-day treks or backpacking in the wilderness. In these cases I am willing to give on some of the orginizational features for better carry comfort and larger volume. I use a Gossamer Gear Gorilla backpack which is carry-on legal provided I don’t over stuff it.
There are a number of ultralight or light weight backpacks which can qualify as carry on baggage. For a list of possible options, look at the ultralight backpacks I discuss in my choosing a backpack post. While a bit on the heavier size, The ULA Camino-2 and Six Moon Designs Traveler might be a good pack for this sort of use.
Remember that you can’t take fuel, knife, or hiking poles carry-on. If you need to carry these things, you can ship them via a postal carrier, send them through as checked baggage (cardboard poster containers work well), or give up bringing your pack as carry on and send your backpack as checked luggage. If you are shipping your backpack as luggage I encourage enclosing it in either a duffel bag or cardboard box.
Most travel packs are really designed to be used in town with an emphasis on ease of use rather than long term carry comfort. My one warning is make sure the travel pack you are considering is still under the limit for carry-ons! Feature and size creep has resulting in many travel packs which are quite heavy and are too big to be used for carry-on.
Below are a list of travel packs which I think are worth a closer look. This is list is in roughly in my preferred order.
- Bags from Tom Bihn: All the bags made by Tom Bihm are amazingly well thought out, have great organizational features, carry well, and are top quality. For some people they may be too small. Choose the bag that fits your packing need and style, but be prepared to pay for the quality. The cache laptop system is wonderful. On most trips I use a Synapse 25 Backpack. It has enough space for nearly all my trips, has three dimensional pockets that are nicely sized, water bottle pocket works well, carries well, durable without being over built.
- Peak Designs Traveler is a kickstarter project from a company that has delivered numerous successful projects desiged for photographers. While Peak’s bag would be ideal for photographers, it looks like it would be a good back for just about anyone. There are no immediate flaws I see in the design, though I have not seen one in person.
- Nomatic Travel Bag is a kickstater project bag designed for travel. Well designed with a lot of organizing features. Clamshell openning, shoe compartment, size storage pockets, internal waterproof water bottle pocket. They have a a number of optional accessories which can make the price really climb
- Minaal Carry-on is a pricy bag that was a successful kickstart project. The bag zips open like a classic suitcase for easy access, has an external water bottle pocket, removable straps, and a well designed padded pocket for a laptop. Clear design, but the webbing waist strap is only for stabilization, not load transfer.
- Osprey TrailKit is a organizational duffel with backpack straps. Organizational features include ventilated pocket for shoes, four externally accessible pockets (water padded, bottle big enough for kindle, 2 general storage), and large main compartment. The division between the pockets and main compartment is not rigid eliminating the sometimes wasted space introduced by pockets. All the zippers face toward the back which is both a good theft deterrent as well as helps keep things clean if you set it down in the dirt. I use this bag when on rare trip that requires more gear than will fit in the Synapse (trips that I wanted to bring clothing appropriate for formal outings, running, hiking in both hot and sub-freezing conditions.)
- Tortugaback Packs is a small company that makes packs specifically designed for the light weight traveler. Suitcase like zipper opening, side access laptop sleeve, zip away straps, and other features make this a well designed travel pack.
- Cotopaxi Allpa 35l is Ingiegogo funded project. Looks like a well designed bag that should carry well. Unzippers suitcase style. My only complain from the description is not seperate section for carrying water.
- Osprey Ozone 46 is a very well thought out travel pack. Made from light weight but adaquately durable materials. It has a foam frame sheet which improves it’s carry comfort, gives some back ventilation, and provides a bit of protection for the contents of the main bag. There is a large compartment which zips half open. The inside is a florescent yellow which makes it easy to see things. Closest to your back is a padded pocket which will hold a 15 inch laptop. On the exterior of the pack are two mesh water bottle pockets, a typical orginizer pocket, and a padded pocket which seems to be sized for a tablet or kindle. There are two compression straps. This pack is also available in a the smaller 36L. This looks more like a backpack than luggage.
- Eagle Creek typically sells nicely designed Travel Packs. They change their models fairly frequently, so I have stopped listing any specific models. When looking at the Eagle Creek bags make sure they are carry-on legal. Many of Eagle Creek “adventure travel” packs are too large for carry on use.
- Redoxx Sky Train: expensive, but well regarded. I have no personal experience with it.
- MEI: some of the better carrying bags, but somewhat hard to find.
- Patagonia MLC: Nothing special but nothing particularly wrong either. Basic travel bag with backpack style straps that hide away.
- eBags Mother Lode weekender Convertible: A very good value, typicaly sold for under $80. While this bag doesn’t have the carry comfort the Osprey Bags, or features that are as refined as Tom Bihn, they have managed to make a well designed bag at a budget price.
- Rick Stevens Back Door Bag: seems to be liked by others, moderately priced, but nothing special.
- Opsrey Porter 46: A durable bag which will protect the contents better than many of the bags because there is closed cell foam sewn into the sides which beside providing extra protection also gives some structure without adding much weight. There is a large U zippered opening provides easy assess when “strait-jacket” compression staps (very effective but get in the way) aren’t cinched down. There a fairly large top pocket which I put everything I might want quick access to while on the move. The lid to the main compartment has an external accessible zippered pocket, and a mesh pocket on the inside. One side of the bag has an internal mesh pocket which runs the length of the bag. This is one of the more comfortable carrying bags I have found. If unfortunately doesn’t have an exterbnal water bottle and is a bit light of organizational features. This was my go to bag for ten years and is now being used by other family members.
- Osprey Farpoint 40: Slightly less volume than a number of the other bags listed here is offset by a real frame which is comfort carrying 15-20lb, external water bottle pockets, a large pocket with organizer pockets and a padded slot for laptop and ereader/tablet, a number of built in straps to keep everything in place. The most significant downside is that the laptop slot is near in the front of the pack rather than against the back.
- Marmot Long Haul and Northface Basecamp Duffel (Small): Very durable and highly water resistant. A good option if you expect your bags to be outdoors a lot and you aren’t looking for organizing features (Marmot has a few features, TNF none). I didn’t find either as comfortable to carry as the Osprey Porter, but would choice it if I expected my bag to spend a lot of time exposed to the elements.
- OR Drybags or similar products. there are a number of companies that make completely waterproof bags that have straps to carry on your back. The more basic drybags are not that cormfortable to carry, but there are more refined products. Often these packs have no orginizational features and are harder to pack, unpack, and find specify items, but if you are somewhere very wet (like watersports) the extra protection is well worth the inconvenience.
- Thule 40L Crossover: access against your back which makes it hard for someone to steal things out of your bag, durable, ok carry comfort, zip closing side pockets for water bottles or other small items, a bit different looking. I liked the design ideas but for the the handle weren’t comfortable against my back and the logo is rather obnoxious. The Osprey TrailKit has many of the same design features, but executes them better IMHO.