Material: these iron on patches are made of denim cloth, they are durable, hard to be worn out and safe to use Simple to use: you do not need to sew these iron on fabric patches, just cut them into the right shape and heat them with iron on the clothes The fabric patches are well crafted with hot melt glue on the back, which has stickiness after being heated Wide usages: with self adhesive function, you can use them to decorate your clothes, suitable to be applied to mend or reinforce your clothes, these patches can be shaped to different design again, nice for craft works as well. Money saver: Repair crotch areas, knees, elbows, pockets etc. when it already has tears marks, or use the patches to prevent future problems. Place a patch inside of the garment on a weak spot before the problem transpires, prolong the life of your new clothes.Not only pants and jackets can be fixed, but also sheets, car seats, even socks and many more. Warm note: please do not iron with steam;These iron on black fabric patches are ironed on outside of the jeans not inside