W-curve shaped positional change cushion to support lower back pain. - Design: W-curve shape - Purpose: Lower back pain relief Thank you for viewing. I bought this for lower back pain, but I am selling it because I purchased something else. I used it once for a short period after purchase. I don't think there are any noticeable stains, but please refrain from purchasing if you are sensitive to used items. I will ship it as is, with the shipping label attached.