Mine are cracker dry before vacuum sealing with o2 absorbers, dessicant, and argon. They don't come out moist either after prolong storage. O2 absorbers use iron that is activated with moisture once opened from original package to scavenge oxygen in the package you place it in but not enough moisture to rehydrate your mushies, hence the need for dessicant packs. It's good practice to dehydrate new dessicant packs before using them to remove any moisture that was picked up along the way from manufacturing to the intended end use.