Are electric blankets safe to sleep with overnight?

Modern UL/ETL-certified electric blankets with auto-shutoff timers (typically 1–12 hours) and overheat protection are designed for overnight use, and every blanket in this roundup carries that certification. That said, specialist communities like r/BuyItForLife repeatedly note that even reputable brands fail, so reviewers recommend setting the auto-off timer rather than running on the high setting all night, and replacing any blanket that shows scorch marks, exposed wiring, or uneven heating.