If you've ever served in the Korean army or watched videos on it, chances are you may have come across Korean army biscuits, a. k.a gun-bbang. Made of hardtack barley, these hard crackers served as a healthy snack for soldiers. A general rule that is safe to follow for all of our apparel is to flip the clothes inside out and machine wash cold, tumble dry low. Washing in warm water typically does not pose a big problem as well. For non-sweatshirt jackets (e. g. windbreaker, bomber jacket), we recommend air drying. For all hats, it is best to hand wash and air dry. Keep in mind that most of our items are 100% cotton and will shrink a bit in the dryer.