At least not for 48hrs from application. You will have to give up washing your hair, a pool session, or the 90 min hot yoga training. Avoid sweating, cardio training (sweating again) for at least a few days. That means no to tears squeezers, no sauna, and no hot bath. Avoid humid places; leave the bathroom right after the shower so you do not expose your extensions to excess moisture. The first 48 hrs are crucial to the success of the treatment. It is the time when the adhesive hardens and any oil or moisture may dissolve it and the extensions will fall out very quickly.