This is a personal preference for your student. In terms of investment and comfort, the two interior designers agree that duvets are more practical. “If allergies aren't an issue, a top-notch baffled goose down duvet insert can last for years, and there's nothing comparable in terms of comfort.” If your student does prefer a duvet but wants to avoid allergens or purchasing down, there are many down alternatives on the market, including eco-friendly recycled options.