Spokey Tracy M purple training gum 928947 Spokey Tracy rubber will prove valid during home training, fitness, pilates, crossfit. Chosen both by beginners, as and advanced. Recommended by a personal trainer, because it helps involve different muscle parts. Works on a similar principle as a expander or a yoga belt that enables performing exercises consisting in stretching and moving sideways. Made of durable material Technical data:· size: M· dimensions: 37x8 cm