The Ultrafins Speedy Fiberglass Black fins are high-performance, durable fiberglass fins for underwater hockey and freediving. Crafted with 25-degree angled aerospace-grade fiberglass blades, these short fins are engineered for exceptional responsiveness and consistent power. Utilizing a proprietary high-pressure manufacturing process for superior strength, they offer the perfect balance of flexibility and durability for competitive play. Featuring Vector footpockets for a secure, ergonomic fit, the Speedy Fiberglass series is available in 50cm and 60cm lengths, making it the best short fiberglass fin for athletes who demand professional speed and hydrodynamic stability during high-intensity training and competition.