ReviveX Odor Eliminator (previously sold as Mirazyme by McNett)
I've used it successfully on packs. If it can get smells out of a nasty wetsuit (original intended use) it should work on your pack.
Revivex Odor Eliminator
Revivex Odor Eliminator is a versatile formula that helps remove strong and smelly odors from wetsuits, tents and footwear.
www.gearaid.com
I've used it successfully on packs. If it can get smells out of a nasty wetsuit (original intended use) it should work on your pack.