G1™ Extreme with 2 slide stops and 6 adjustable discs allows multidirectional movement for flexibility and specific conditioning. Develops core muscles, leg strength, and quickness. G1™ Slide with 2 adjustable lateral stops offers many training options in two lengths. Heavy-duty Lexan® plastic construction; roll up for storage. Durable nylon "booties" are machine washable. Colors may vary.