HELIOS: Set of 4 Pieces Of Gray Colored, 2 X 2 Foot Interlocking Spongy Soft Floor Pads : ( Pack of 2 Sets ) Package Of 4 Pieces In Gray Color - One Side Smooth, One Textured - Made Of Soft Rubber Interlocking Edges, Each Piece Is 2 X 2 Feet, So This Set Creates 16 Square Feet Of Cushion 3/8 Inch Thick, Makes It Easier On The Feet And Legs To Stand For Hours Every Day Great For Work Area, Play Area, Game Room, Poolside, Exercise Room, Classrooms And More Can help reduce injuries from falling, as well as fatigue