路 Discs are EVA foam on one side and hard plastic on the other. 路 Weighs only 190g making them very light and compact that you can pack them in any bag and take them wherever you travel.Use to strengthen core and for abdominal workouts 路 Sliding plates for exercise are dual sided so they can be used on carpet as well as hard surfaces 路 Increase flexibility, range of motion and balance.Easy to add into your existing routine like Yoga, Pilates, Aerobic, Strength Training, and Weight Training. 路 Exercise sliders are easy to store when not in use 路 Bag makes them easy to take with you. Package Includes: 2 x Dual Sided Fitness Gliding Discs Core SlidersChina Yoga Accessories factory website:http://www.jhgym.com/yoga-accessories/