These are Modibodi pee/period proof full briefs. They are brand new and still sealed in the recyclabled/recyclable brown package. These underwear are excellent for someone transiting away from disposable absorbent products. Underwear is more bulky than regular underwear, but it does not appear any different under clothing. Very absorbent and rinses out easily. Be sure to follow care instructions. Keep in mind, this is a snug 18/2XL because the underwear needs to stay close to the body so it will be able to catch any leaking fluids. The material will stretch a little bit after the first wash, but in my two years of using them, I have not noticed them stretching past that first wash. I have never experienced these to leak and I have a very heavy flow. I have worn them to bed and out wearing light colored pants and dresses. It has never failed me. I have heard they are great for wearing after having a baby during the recovery period.