Yes, this eye patch will keep moisture in if it fits your face. The description suggested it would fit under my glasses, but this was true only if I put them down my nose and wasn't afraid of the plastic scraping my lenses. Recommendations to manufacturer: extend the foam at least an eight inch past the edge which is quite sharp; make the plastic slightly thinner so that it flexes more easily; attach the elastic to tabs on top of the plastic rather than using a hole and knot that pokes into the foam and skin below; finally, add a 1/4th inch elastic band with an adjustment slider. I'll keep looking.