cosios Board Cushion (Posture Correction, Beautiful Posture) Unisex, Suitable Size: Hips approximately 82-105cm I have used it a few times, but the frequency of use was low, so I think it's in relatively clean condition without any noticeable scratches or stains. This is an item for the main body only. It will be shipped using recycled cardboard. Please purchase with the understanding that this is a used item. Product Description Let's start with beautiful posture. Pushing your lower back with the power of sitting, your lower back will be comfortable even when sitting for long periods! Applying the "principle of leverage" to maintain a natural S-curve of the spine! Just by sitting, you can apply the principle of leverage to push your lower back and lift your pelvis. Your back muscles will naturally form an S-curve! Your lower back will be comfortable even for long periods with the correct posture! Approach the gluteus maximus from the side! Hold your buttocks from the side to tighten your pelvis! ■ Product Name / Board Cushion cosios ■ Color / Black ■ Size / (approx.) D35.5 x W34.5 x H20.5cm ■ Weight / (approx.) 505g Material / Main body fabric: 100% polyester, Front side filling: Polyurethane resin, Back side filling: Styrene-butadiene resin, Plate part: Polypropylene resin, Polyethylene resin