Freebase Nicotine vs Nic Salt: How They Differ in the Hand
Nicotine salt is nicotine combined with an acid, so it feels smoother at high strengths such as 20mg to 50mg and suits low-power pod kits and disposables. Freebase nicotine is the unbound form, harsher at the same strength, so it's sold weaker, usually 3mg to 12mg, for higher-power devices.