Do
Ursacks meet bear resistant requirements for the areas you plan to travel?
In NY, no, the ursack since it is not solid and non-pliable material does not meet the requirements where a bear resistant canister is mandatory:
Only canisters successfully tested by the IGBC pass the certification test. IGBC Certification: Products that successfully withstand the bear testing for a specified duration are certified as bear-resistant by the Interagency Grizzly Bear Committee (IGBC).
Using a bear-resistant canister is the most effective way to prevent bears from becoming emboldened to obtain food from back-country campers.
dec.ny.gov
Selecting a Bear-Resistant Canister
Bear-resistant canister means a commercially made container constructed of solid, non-pliable material manufactured for the specific purpose of resisting entry by bears.
Tested and approved bear-resistant canisters can be purchased or rented from many local, national, and web-based outdoor recreation retailers. However, black bears in the Eastern High Peaks Wilderness have regularly defeated bear-resistant canisters made of clear plastic. Campers are encouraged (although not required) to use another type of bear-resistant canister to prevent the loss of food. When selecting a bear-resistant canister consider the following:
Has the canister passed rigorous testing with live bears?
Is the canister made of solid, non-pliable hard plastic or metal with smooth, rounded edges and no handles?
There shouldn’t be any features that a bears' claws or teeth could grip under or that would allow a bear to carry the canister away.
Is the canister large enough to store all scented items for the entire duration of your trip?
Canisters typically are 8 inches by 12 inches in size and hold up to 5 days of food for 1 person, when properly packed.
Does the canister have a lid that is easy to remove and secure? This will help ensure scented items can be easily secured after each use.
New York State law states that, during the period April 1 through November 30, no overnight camper in the Eastern/Central High Peaks Zone shall fail to use bear-resistant canisters for the storage of all food.
adk.org