Our premium ultrasoft cotton flannel boxers, in just the right weight to stay warm and cozy without overheating.Why We Love ItAn L.L.Bean exclusive, our plush flannel fabric is meticulously woven with longer-staple cotton, which means the individual cotton fibers are about one-quarter inch longer than short-staple fibers, making a huge difference in fabric strength and quality. Then, it's meticulously brushed eight times on each side and given a "touch test" by a master weaver to declare it soft enough.