REI Co-op Trailbreak 30 Review: The Best Cheap Bag for New Backpackers
The Trailbreak 30 is REI's entry-level synthetic mummy, and it exists for one reason: to get a first-time backpacker out the door without blowing a paycheck. It is not light and it is not fancy, but it stays warm on summer and shoulder-season nights and it survives being loaned out to friends.
What we liked
- About 120 dollars for a real mummy with a hood, draft collar and full-length zipper
- Synthetic fill keeps loft when damp - forgiving for beginners camping in humid areas
- Roomy enough for a six-foot sleeper and easy to wash at home
- Tough polyester shell shrugs off tent-floor abrasion
- Stuff sack and cotton storage bag included
What to watch
- Heavy and bulky - roughly double the packed size of a comparable down bag
- The 30 F rating is optimistic; most sleepers will want a liner below 40 F
- Zipper snags if you rush it in the dark
In depth
What a budget 30 F rating really gives you
Temperature ratings on sleeping bags describe a limit rather than a comfort point, and budget bags are often optimistic even by that standard. A 30 F bag is generally comfortable for an average sleeper somewhere in the low single digits Celsius, and it is a survival rating below that. Cold sleepers should assume they will be uncomfortable at the stated number.
The reason is partly measurement and partly the bag itself. Ratings come from laboratory tests on a heated manikin wearing a baselayer on an insulated pad, which is not how most people sleep. Synthetic fill also loses a little loft over the years, so a bag that was borderline when new becomes clearly inadequate after three seasons.
The practical approach is to treat the rating as the temperature at which you would still be safe, and to plan comfortable nights a good five degrees above it. For summer backpacking that is usually fine; for shoulder-season trips it means adding a liner or wearing more layers.
Synthetic fill: the right compromise for beginners
Synthetic insulation keeps a meaningful amount of its warmth when damp, which is exactly the failure mode that ruins a first backpacking trip. A down bag that gets soaked loses most of its insulation, while a synthetic bag continues to work, just less well. For beginners camping in humid climates or in tents that collect condensation, that forgiveness is worth real weight.
The costs are packed size and weight. A synthetic bag of this rating is roughly twice the packed volume of a comparable down bag, which matters if your pack is small. It is also heavier for the same warmth, which matters if you are hiking far.
Synthetic bags are also simpler to live with. They tolerate being washed at home, they do not need special detergent, and they are less sensitive to long-term compression. For a bag that will be loaned to friends and stuffed into a car boot, those qualities count for a lot.
Fit, length and the pad underneath
A mummy bag works by keeping dead air close to your body, so an oversized bag is a colder bag. The fit should be snug at the shoulders without compressing the fill, and the hood should close down to a small opening around your face. If you can turn over inside the bag rather than with it, it is too big.
Length matters for tall sleepers. Most bags come in a regular length around 183 cm and a long version for people over about 185 cm. Sleeping with your head jammed into the hood or your feet compressing the bottom of the bag both cost warmth, so choosing the right length is not a vanity issue.
The most overlooked factor is the pad. A bag's underside is crushed flat and provides almost no insulation, so your warmth from below comes entirely from the mat. An air mat with a low R-value will leave you cold in a bag that would be perfectly warm on a properly insulated pad, and this single change often solves the problem people blame on the bag.
How to sleep warm in a marginal bag
Technique makes a bigger difference than most people expect. Eating a proper dinner and drinking something warm before bed gives your body fuel to burn overnight. Going to bed warm rather than cold, with a few minutes of movement or a hot drink, means you fall asleep before the bag has to work hard.
Wearing dry baselayers is essential and wearing too many layers is counterproductive: if you sweat, the moisture stays in the insulation and you get colder. A hat makes a disproportionate difference because a lot of heat leaves through an uncovered head, and the hood alone is not always enough.
A simple hot water bottle made from a well-sealed bottle filled with hot water, wrapped in a sock, will keep a sleeping bag comfortable for an hour or two and costs nothing. Ventilating the tent to reduce condensation also helps, since a wet bag is a cold bag.
Washing, storage and making it last
Synthetic bags are the easiest type to launder. A front-loading machine on a gentle cycle with a mild detergent, followed by a low-heat dry, is usually enough. It is worth checking that the machine has no agitator, since a top-loader with a central agitator can tear the shell and baffles.
Store the bag loose rather than compressed. A synthetic bag will recover most of its loft after a trip, but months of compression in a stuff sack will permanently flatten the fill. A large mesh or cotton sack is the cheap solution.
The zip is the most common failure point. Pull the two sides together with one hand while moving the slider with the other rather than yanking, and lubricate a sticky zip with a little silicone or zip wax rather than oil, which attracts grit. A snagged zip that tears the fabric is the most common way these bags die early.
When to upgrade and what to upgrade to
The upgrade triggers are weight, packed size and temperature range. If you find yourself leaving the bag at home because it fills your pack, or you are cold on shoulder-season trips, it is time to spend more. There is no sense in buying a second budget bag, since you will hit the same limits.
The next step for most people is a down bag or a quilt, which will halve the weight and packed size for the same warmth. A quilt is lighter still and works well for back sleepers in mild conditions, while a down mummy bag handles colder nights more reliably.
The other sensible path is to keep this bag for car camping, loaning to friends and summer trips, and buy one good bag for the trips that matter. Two bags covering different jobs is often cheaper and more useful than one compromise.
Questions we get asked
Is a 30 F bag warm enough for summer?
For most summer camping in temperate regions, yes, though cold sleepers and people camping at altitude may want a liner. Below about 5 C, plan on extra layers or a warmer bag.
Can I machine wash it?
Yes, synthetic bags are the easiest to wash. Use a front-loading machine on a gentle cycle with a mild detergent, avoid fabric softener, and dry on low heat. Check for a working agitator-free drum first.
How should I store it between trips?
Loose, in a large mesh or cotton sack, somewhere dry. Never leave a sleeping bag compressed in its stuff sack for months, because synthetic fill takes a permanent set and will not loft back.
Will it fit a tall sleeper?
Regular-length bags generally suit people up to about 183 cm, and long versions cover taller sleepers. If your feet press hard against the bottom of the bag, the fill is being compressed and you are losing warmth.