The accustrike mat Impact Golf Training Mat employs a special fiber fabric that is designed to leave a dark mark that shows you where your club head strikes the mat in relation to where the ball is placed. This golf swing practice mat is designed to be used outdoors staked into the ground. Perfect for hitting balls at the range After you see the mark left on the mat, your swing path, you can instantly begin to correct your swing. This will help you correct your predominant swing path errors because now you can see it. NO MORE GUESSING! A great real-time training product, perfect for evening or off-season practice. Great Practice and Training Aid This one-inch thick foam golf swing practice mat attaches to an industrial carpet and other closed loop carpets with Velcro but also includes a strong adhesive that will attach to concrete. The Acu-Strike Golf Training Mat, special fabric, leaves a dark mark that shows you mat your swing path and where the club head touches down Using this mat, you are trained to improve the proper arm and wrist posture on holding and positioning the golf club effectively. This mat can be used anywhere you desire. Train anywhere whether indoor or outdoors. I have confidence in Golf Training Aids because they wouldn't carry a product unless certain of its value their approach is both science based and customer centered. Bottom line I trust them. TJ Tomasi Ph.D., Golf Magazines Top 100 Teachers Indoor mat and outdoor range mat. Outdoor unopened boxed, indoor version box opened not used. We truly believe we make some of the most innovative products in the world, and we want to make sure we back that up with a risk-free ironclad 30 day guarantee. If you don't have a positive experience for ANY reason, we will do WHATEVER it takes to make sure you are 100% satisfied with your purchase. Buying items online can be a daunting task, so we want you to realize that there is absolute ZERO risk in buying something and trying it out. If you don't like it, no hard feelings we'll make it right Money Back Guarantee: If your items arrive damaged or becomes defective within 30 days of normal usage, we will gladly issue out a replacement or refund. We have a team of live reps ready to help and answer any questions you have within a 24 hour time frame, 7 days a week. We have 24/7/365 Ticket and Email Support. Please contact us if you need assistance.