Goodthreads men's standard fit long sleeve Heather flannel shirt is made of 100 percent cotton and buttons from neck to waist. The shirt can be machined washed and machine dried on medium setting. This shirt was a good fit for my husband. He liked the heather grey color and the comfortable feel. Felt soft and not heavy as you might think flannel would feel. The shirt can be worn buttoned up or open with a nice colored t shirt. This shirt would also do well under a sweater with the collar showing outside of the sweater. Casual or semi casual with jeans or dress slacks could work well with this shirt. If you are looking for a nice flannel shirt in a different color this shirt is for you.