Marketing campaigns can be misleading, and it seems no industry is safe from tricky language and offers that are slightly too good to be true. This phenomenon has spread to the bedding industry in the form of the “Siberian goose down” blanket. There’s a sneaky bit of psychology at play here: We think of Siberia as one of the coldest places on Earth. Surely a Siberian goose would require specially insulating feathers to survive there. Don’t be fooled; very few Siberian goose down products are genuine.

Rather than focusing on creative marketing techniques to persuade you in your purchasing habits, look at quantitative evidence. You can judge the worth of a goose down comforter based on its fill power. This measurement is attained by compressing an ounce of down under a specified weight, and then releasing the pressure to see how much the down expands. A down filling that takes up 600 cubic inches of space per ounce, for instance, would be listed as 600 fill power. Higher fill power equates to higher-quality bedding.