I purchased this for lower back pain after giving birth. I bought it on the recommendation of a doctor at the maternity clinic. I've used it about 3 times. It doesn't fit, so I haven't used it much. The elastic is like new and hasn't stretched at all. A black belt in size L-LL made of breathable mesh and stretch material. - Size: L-LL - Color: Black - Material: Mesh and stretch material I will ship it in simple packaging. I heard it can also be used for lower back pain before childbirth. You use it by wrapping it around your pelvis. It has been stored at home. I don't have any pets, and I don't smoke. I purchased it for around 4000 yen. I'm offering it at a reduced price as much as possible. Please refrain from price negotiations.