NO. Contact Lenses should never be kept in the eyes for sleeping, this can cause your eyes to dry out & get irritated. Not to mention the more serious risks of scratched cornea & an increase in eye infections! Overall these contacts are great, they are light weight & breathable which allows your eyes to breath and not get dry. Recommended time for each pair is 2 weeks, if you keep them in longer they absorb healthy proteins and cause damages to the eyes (once again a risk for infections) its always best to buy the year supply as you usually only pay for like 9-10 months and get 2-3 months free.