3M Golf Practice Putting Mat Blanket3M Golf Practice Putting Mat Green Blanket Mat In Outdoor Training Aid Golfing Features: Gravity Automatic Ball Return: Has a simple design of automatic ball return relies on gravity. Whether you make or miss your shot, your ball is returned quickly to you through the track on the side of the mat without wasting time walking to the hole to retrieve the ball again and again Dual Track Designed: This golf training mat has two holes in different sizes.