FEATURES Portable bunker simulator designed to give you the feedback and instructions you need to really improve your bunker game. Designed with a top layer custom developed by WhyGolf to mimic the feel and ball flight of sand, an internal "bounce" layer with just the right amount of resistance to digging, and a bottom rubber layer for weight, traction, and durability. Designed to be used with regular golf balls (outdoors) and foam balls (indoors) Get immediate feedback on the quality of your contact - if you dig with your wedge's leading edge or hit too far behind the ball, you'll know immediately Comprehensive instructions provided with purchase Perfect for full-swing golf simulators WHAT'S INCLUDED (1) Bunker Mate (2) Foam practice balls