This is a lightweight jacket made of crinkly fabric with no lining. It's light and can be folded small, so it fits in a bag. It also has a good length, so it doesn't emphasize body shape, and with adjustments to the inner layer, I think it can be used all year round. There is no size indication, so I've listed it as M, but please check the photos for actual measurements. I think those who wear L size could also wear this comfortably. There is a pocket on the lower left back.