Product structure: 1st layer: soft non-woven fabric with crossing embossing 2nd layer: tissue paper 3rd layer: fluff pulp mixed with SAP, absorb the liquid very fast and quickly 4th layer: tissue paper 5th layer: Clothlike backsheet, can prevent the leakage, and keep the bed dry and clean Size:23''x16''(60x40cm), 23''x23''(60x60cm), 23''x36''(60x90cm) Quantity: 30counts for 23x16inch, 20counts for 23x23inch and 23x36inch Validity period: 3 years Note: Due to the manuel measurement, the size above may differ slightly (less than 1") from the actual product. Please understand.We offer 3 sizes to choose to fit most men and women, please check our size chart above to choose the right changing pads. Disposal After Use: 1. Dispose the used disposable underpads after proper wrapping. 2. Do not drop into the toilet bowl. 3. Do not litter, as disposable undepads may cause pollution of the environment.