1. Material: Silicone 2. Size: M (37-41): 52.5x18.5x9cm, L (42-47): 57 x 20 x 10cm 3. Weight: M (37-41): 990g, L (42-47): 1180g 4. Features: light and durable, soft and comfortable, training speed 5. Purpose: Practice backstroke, freestyle, and butterfly 6. Swimming training, improve swimming speed, correct leg movements, short fins for snorkeling, easy to carry 7. Enhance the rhythm of kicking water, correct movements, exercise leg endurance 8. The sole fits the sole of the foot
