ComfyChoices® No-Bulk Fleece Lining is warmer than tights and cotton Long Johns. With no crotch, butt, or waist, the liners are easy to put on and take off. It's a money-saver because you can make your summer pants into winter pants affordably. No-Bulk Fleece Lining can be removed with pants on. Perfect to pack for travel. Ideal for people who are cold all the time due to thyroid issues or decreased circulation, people who are outdoors, such as gardeners, construction workers, motorcycle riders, hunters, etc.