Denim, like jeans, come either as Uncooked or as “washed” denim. Washed denim refers to denim that’s been washed during production. In contrast, Uncooked denim is denim that hasn’t been washed. Check out the seams and make sure they’re tightly sewn and no cost from any maker blemishes. Sloppy workmanship can spoil a jacket even if the