There are two main actions of water on hair: chemical and mechanical. The chemical action refers to the pH difference potentially damaging the hair, while the mechanical action refers to how water can cause the hair to swell and weaken its structure. The key is to find a balance, as slightly dampening the hair can provide benefits without causing too much damage. Additionally, it is important to be mindful of avoiding pulling and twisting the hair while wet and to allow enough time for the hair to dry properly. The Wet2Dry baseline of 1 hour is a suggestion for a balance between moisture benefits and avoiding damage caused by prolonged water exposure.