Bear Canister or Ursack? Where Each One Makes Sense
One is lighter and easier to pack. The other is the only one some parks will accept.
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An Ursack weighs less than half a pound, squishes into any corner of your pack, and shrinks as you eat. A hard-sided bear canister weighs about 2 to 4 pounds empty, by SectionHiker’s count, and packs like a small keg. On weight alone, it’s no contest.
But weight isn’t the deciding factor. The rules for the place you’re camping are, and in some well-known parks, Yosemite among them, the soft bag isn’t an option. Here’s where each one makes sense, and which ones independent testers rate highest.
- Best for most backpackersBearVault BV500: room for a long trip, and CleverHiker rates its weight-to-capacity ratio the best it tested. Check the price on Amazon
- Best budget pickBearVault BV450: smaller, lighter and CleverHiker's affordable pick, sized for weekend trips. Check the price on Amazon
- Lightest, where it's allowedUrsack Major: 7.6 ounces and IGBC certified, CleverHiker's best bear bag. Check the price on Amazon
- Most widely acceptedCounter Assault Bear Keg: opaque and roomy, and Outdoor Life's most widely accepted canister. Check the price on Amazon
- Most packable canisterBearVault BV ONE: CleverHiker's best canister overall, and it collapses for short trips. Check the price on Amazon
The two approval lists, and why neither one is the final word
Two groups have tested bear containers, and you’ll see both names on packaging.
The Interagency Grizzly Bear Committee (IGBC) runs the test most agencies point to. Products have to pass a live test with captive grizzlies or a technical evaluation. CleverHiker describes the test as a baited container that must “withstand 60 minutes of being crushed, clawed, and chewed by grizzly bears.” The Ursack Major and Ursack AllMitey are on IGBC’s certified list as soft-sided food containers, alongside BearVault’s canisters. But the IGBC says plainly that certification “does not imply that products have automatically been approved for use on all public lands.”
The Sierra Interagency Black Bear Group (SIBBG) once tested canisters for the Sierra Nevada parks and forests. CleverHiker says it “is no longer active,” and its website, sierrawild.gov, was down for maintenance when this post was written. Its stamp still shows up on older canisters.
So the list that matters is the one the land manager publishes for the place you’re going. Read it before you buy, and again before you go, since lists change.
Where an Ursack won’t do
These places require a container and either spell out hard-sided or leave soft bags off their approved lists. Rules and dates change, so confirm with the park or forest before your trip.
- Yosemite National Park. The park says bear canisters are “required for overnight hikers throughout the wilderness” and that “Hanging food is illegal throughout Yosemite.” Its allowed-container list (updated July 10, 2026) names only hard-sided canisters, stock panniers and one hard-sided backpack. No Ursack or other soft bag is on it.
- The Eastern High Peaks Wilderness, New York. The state DEC requires a canister for overnight campers from April 1 to November 30, and defines it as “solid, non-pliable material.” It adds: “Non-rigid containers, sacks, or food hangs are not considered bear-resistant canisters under the regulation.”
- Desolation Wilderness, near Lake Tahoe. The Forest Service’s Lake Tahoe Basin unit requires hard-sided bear canisters for overnight visits.
- Rocky Mountain National Park. The park’s 2025 rules require “a commercially manufactured carry-in/out bear-resistant food storage canister” from April 1 to October 31, and say “Other methods of food storage are not permitted in the wilderness.” Andrew Skurka reported in 2019 that the park then allowed certain Ursacks only with an aluminum liner. The current rules don’t mention Ursack, so ask the park before you count on one.
- Olympic and Sequoia & Kings Canyon National Parks. Olympic now requires approved containers in all wilderness areas, and Sequoia & Kings Canyon requires them in the Rae Lakes Loop, Dusy Basin, Rock Creek and a few other areas from May 1 to October 31. Neither page names soft bags, but Outdoor Life lists both parks (along with Yosemite, Big Bend and Bryce Canyon) as places the Ursack isn’t allowed. Check each park’s own approved list.
Some forests leave the door open without naming products. The Inyo National Forest, which borders Sequoia & Kings Canyon, requires “a container designed to prevent access by bears” in eight popular areas without saying whether it has to be hard-sided. That’s a question for the ranger station, not for guesswork.
Where an Ursack makes sense
Plenty of backcountry doesn’t require a hard canister, and that’s where the Ursack shines. Halfway Anywhere reports that Lassen Volcanic National Park approves the Ursack Major and AllMitey, and that two Washington national forests on the PCT accept IGBC-certified bags where you can’t hang food. Bike Hike Safari says IGBC-certified bags work as soft-sided alternatives “in most US national forests and many national parks,” which is a good starting point, not a guarantee.
It’s also a good answer where trees are scarce or bears have learned to beat a hang. If you’re still hanging, the bear bag guide covers how to do it right.
What you give up is real, though. Testers agree on the trade-offs:
- It’s not crush-proof. CleverHiker says the Ursack “isn’t 100% foolproof,” and SectionHiker readers report bears chewing on a bag for a long time and turning the food inside to mush without breaking in.
- You have to tie it right. Outdoor Life rates it “Very Difficult” to use and says “there is a learning curve.” It has to be knotted shut and tied to a tree or other fixed object, SectionHiker explains.
- It soaks up rain. Bike Hike Safari says it “absorbs water when wet.” Ursack recommends an odor-proof liner inside, SectionHiker notes.
Skurka splits the difference himself: a BearVault BV500 where canisters are required, and an Ursack Major where they aren’t. For anyone who backpacks in both kinds of places, that’s a sensible setup.
The picks
BearVault BV500
For most backpackers heading somewhere canisters are required, this is the one to start with. CleverHiker gives it its best weight-to-capacity award at 2 pounds 8.9 ounces and 11.5 liters, and calls it “a strong balance between weight and capacity.” Skurka points out it carries about 30 percent more volume per ounce than the smaller BV450, and it’s the canister he uses where one is required. It’s on Yosemite’s allowed list and IGBC’s certified list.
The catch: It’s bulky, and CleverHiker calls it overkill for short trips. Clear walls are a problem in New York’s Eastern High Peaks, where the DEC says black bears “have regularly defeated” clear plastic canisters.
BearVault BV450
The BV450 is the BV500’s smaller sibling, and the better fit for weekend trips. CleverHiker measured it at 2 pounds 1.2 ounces and 7.2 liters, and found it “secure against most critters and typical black bear encounters.” It doubles as a camp stool, too. Outdoor Life names BearVault its best overall canister.
The catch: CleverHiker found it hard to open in the cold, and the same clear-wall caution applies. Seven liters fills up fast on a longer trip.
Ursack Major
If the rules allow it, this is the lightest way to keep food from bears. At 7.6 ounces by CleverHiker’s measure, it’s about 60 percent lighter than a BV500, according to Skurka, and it’s on IGBC’s certified list. CleverHiker names it the best bear bag, and Outdoor Life calls it the best ultralight option. If you also worry about mice, Ursack’s AllMitey adds a critter-resistant inner layer; SectionHiker found it heavier than the Major and, like it, not approved everywhere canisters are required.
The catch: It isn’t allowed in Yosemite, New York’s Eastern High Peaks or other places that require hard-sided containers. It isn’t crush-proof or waterproof, and it only works when it’s tied correctly.
Counter Assault Bear Keg
The Bear Keg is the heavy, solid option. CleverHiker found it “hard to beat” for strength and reliability, and Outdoor Life calls it the most widely accepted canister. It’s opaque, which matters in the Eastern High Peaks, where the DEC encourages a canister other than clear plastic. It holds 11.7 liters, and it’s on Yosemite’s list. IGBC lists it among products it hasn’t recently reconfirmed with the maker, which it says are still “considered IGBC-certified.”
The catch: It’s heavy. CleverHiker weighed it at 3 pounds 10 ounces, and Outdoor Life calls it “bloody heavy.”
BearVault BV ONE
CleverHiker’s favorite canister overall is BearVault’s newest. It weighs 1 pound 15.6 ounces by CleverHiker’s measure, expands to 8.3 liters, and collapses to 4.7 liters for short trips. CleverHiker calls it “our favorite canister due to its compact size, low weight, and user-friendly design.” It’s on IGBC’s certified list.
The catch: CleverHiker says it’s not yet approved in Yosemite, and the park’s July 2026 list doesn’t include it. Like other BearVaults, its walls are clear. This is a good example of why it pays to read the list before you buy.
If budget isn’t a concern: Skurka’s pick is a carbon-fiber Bearikade, which carries more volume per ounce than any other hard canister in his comparison. It costs far more, though. By his math, a dollar buys about four times less volume than with a BV500.
The bottom line
Check the rules first, then choose. If your trip goes anywhere that requires a hard-sided canister, the BearVault BV500 is the right buy for most backpackers, and the BearVault BV450 is the budget pick for shorter trips. If your trips mostly go where soft bags are allowed, an Ursack Major saves about two pounds over a BV500. Owning one of each isn’t overkill; it’s what Skurka does.