Red Grilla Gear Pro-Grade Extra Firm - Ab Exercise Mat For Sit Ups, Crunches, Core Exercise Training SUPERIOR AB WORKOUT - Get More Out Of Your Ab Workouts With This Ab mat WHY CHOOSE FIRM? - This Mat is Meant to be Firm Because It Will Make You Maintain Great Form and Technique. Which Means Better and Faster Results. (It Will Slightly Soften Over 30 Days of Use) THE DIFFERENCE COMPARED to SOFTER MATS - Most Other Mats are Softer and may feel more comfortable, unfortunately this allows a lesser amount of extension of the abdominal muscles and less effective MADE TO LAST LONGER! - Made With a Higher Grade Synthetic Leather (Not PVC) - Won't Flatten, Won't Tear and Will Maintain its Shape NON-SLIP BACKING - The Backside of the Ab Mat Provides a Gripping Texture to Preven Slipping During Use