Yes, it is completely safe to sleep with Aculief on. If you’re struggling with headaches at night, Aculief could be the answer you’re looking for. Research has shown that applying temperature therapy can help promote sleep, making Aculief ideal for anyone who gets migraines at night or first thing in the morning. Aculief’s breathable, lightweight, and cushiony gel packs also make it excellent for sleep. Whether you’re a side, back, or stomach sleeper, you won’t be disturbed by Aculief… it’s designed to be comfortable even when worn for a long time. Don’t forget that Aculief includes a special eye cover that blocks out light, making it even better for sleep (or even a quick nap).