MATERIAL: The rowing machine seat cushion is made of memory foam material, comfortable, durable and sturdy for use. FITS ON CONCEPT 2 ROWING MACHINE: This seat cushion is designed with exact specifications for Concept 2 rowing machine seats in mind - so it fits comfortably. SLIP-PROOF TECHNOLOGY: The underside of the cushion is covered with a new, extra strong non-slip fabric, so it can stay in place even during intense workouts. DESIGNED FOR FREQUENT USE: Using this rowing machine seat cushion during your workouts helps reduce pain and discomfort even after several daily rowing exercises. EASY TO CLEAN: All you need to do is wipe it with a damp cloth and let it dry - as simple as that. About shipping: All items will be shipped within 3 business days after payment is received. Most often you will receive them within 8-12 days. The specific delivery time depends on the circumstances. Questions, please contact us. During the shopping process, if you have any questions, please contact us, we will reply to you within 24 hours, wish you a happy shopping. Thank you for your cooperation and we will make you satisfied.