This depends on the temperature in a room, as well as the weight and material of the throw blanket. “As a standard, a blanket with a thick, fluffy, soft material will retain more body heat and be warmer,” says Dunford. “If you run hot, I’d suggest a lighter fabric like a thin cotton or linen.” Also keep in mind that a throw blanket was not designed to be the only thing covering you up in bed throughout the night—that’s what sheets, bedspreads, comforters, and duvets are for (though not used all at once). While a throw blanket can help keep you toasty while sitting on the sofa, oftentimes it’s more of a source of comfort than warmth.