Made with highly flexible and strong PU foam, guaranteeing extended and frequent use Small and easy-to-carry design measuring roughly 16 x 13 cm / 6.3 x 5.12 inches, suitable for both inside and outside use Simple to maintain with clear cleaning directions to keep the golfs swing training ball in excellent shape over time Appropriate for golfers of all proficiencies, from beginners to advanced players, for training in different environments or on the field Engineered with integrated alignment feature to improve swing accuracy and consistency, excellent for honing golfs skills