This is a flannel shirt from L.L.Bean, made in Canada, a rare line following the USA-made ones, from the 1990s. The tag features the "QUALITY GUARANTEED" logo used in the 90s, and it's a popular model in the vintage clothing market due to its scarcity. It has the classic red and black check pattern and is made of soft cotton flannel fabric that isn't too heavy. Unlike current products, it has the appealing sturdy stitching and texture unique to that era. The size is a valuable L. With its relaxed silhouette, it's easy to wear as a single layer or as an inner layer under outerwear.