Specifications: This is a full fit massage cushion with sunken design, which is not painful for long time sitting. It can be inflated or filled with water, making you feel more comfortable. The bottom is non-slip, which is wear-resistant and durable. It is produced based in the ergonomic design, so you will not feel tired after sitting for a long time. Precautions: Do not over-inflate or rush into high-pressure gas Avoid jumping on the inflatable product or placing the inflatable product next to flames or high-temperature objects If it is not used for a long time, it should be folded and placed in a flat and dark place to avoid excessive friction and compatible with sharp objects Air leakage of inflatable products is normal. Item Name: Cushion Material: PVC Thickness: 0.3mm Features: Non-Slip, Wear-Resistant, Durable, Full Fit Product size: 17cm x 15cm x 4cm/6.7" x 5.9" x 1.6" (Approx.) Size After Inflation: 39cm x 37cm x 15cm/15.35" x14.6" x 5.9" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Cushion This is a full fit massage cushion with sunken design, which is not painful for long time sitting. It can be inflated or filled with water, making you feel more comfortable. The bottom is non-slip, which is wear-resistant and durable. It is produced based in the ergonomic design, so you will not feel tired after sitting for a long time. Precautions: