Works like a sleeping bag you just zip it Zipit Bedding is a fitted sheet and a comforter zipped into one fast, fun, and easy unit.;Available in multiple colors and patterns, and in full, twin, twin extra long, and queen sizes.;Perfect for hard-to-make bunk beds, college dorm beds, trundle beds, murphy beds, squishy air mattresses and more.;it isback to school season Twin and twin XL are the most common sizes for college dorm mattresses.;Zipit makes laundry simple too. Simply strip it off the bed, wash, and re-fit as one unit.