Reviews / Bear Safety

Ursack Major XL Review (2026)

Ursack Major XL uses Spectra fiber — the same material in bulletproof vests — to create an IGBC-certified bear-resistant bag that weighs 8 oz vs. the 2+ lbs of hard bear canisters. Bears can't open the bag; they can dent it but not access contents.

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Ursack Major XL — Bear Safety review photo
Illustrative
9
Grant's score
The short version

Ursack Major XL is the ultralight alternative to hard bear canisters. We looked at the IGBC approval process and compared the weight savings vs. BearVault.

Who it's for

Buy this if: Ultralight backpackers in areas where IGBC-approved bear protection is required.

Skip this if: Hikers in national parks that specifically require hard-sided canisters — some parks don't accept soft canisters regardless of IGBC approval. Verify local requirements.

In practice

Spectra Fiber Bear Resistance

Ursack tested bear resistance against grizzlies, black bears, and polar bears. The Spectra fiber withstands clawing and biting — bears cannot tear it open. However, a determined bear can crush the bag, compressing the contents. Food is bear-protected but may be damaged. The major practical limitation: jars and breakables don't do well under bear compression.

What we loved
+ 8 oz vs. 2+ lbs for a hard canister — 1.5 lb weight savings+ IGBC approved for use in most bear-country regulations+ Packs flat — no awkward cylinder in your pack
What we'd change
– Bears can crush it even if they can't open it — smashed food may be ruined even if not consumed– Not accepted in all national parks despite IGBC approval — verify regulations before trip
Where to buy

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Links are Amazon affiliate links — we earn a commission if you buy, at no extra cost to you. It never changes our score.

The verdict
9

Worth the weight savings where regulations allow. Verify park-specific regulations — some require hard canisters.

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Common questions

How do I tie it?
Tie to a tree trunk with the included Dyneema cord and figure-8 knot. Bears can't untie it but may carry the bag — tie prevents total loss.
What's the capacity?
XL holds 10.5 liters — 3-4 days of food for one person.

Methodology: Our gear ratings combine manufacturer specifications with aggregated owner feedback and long-term durability reports from verified buyers. We weigh value, packability, durability, and real-world reliability. Ratings are never influenced by commission rates. Last verified 2026-07-03.

Affiliate disclosure: This review contains Amazon affiliate links. If you buy through them, Gear Made Simple earns a small commission at no extra cost to you.

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