Zoggs swimming fins just got an eco-upgrade! New Eco Short Blade Fins are made with 35% sustainable recycled silicone - the first ever swim fin made with recycled materials! They also come packaged in a reusable mesh carry bag. These short blade fins are specifically engineered to for optimum propulsion, performance and comfort. The heel pocket is soft for a customised fit and for ease to put on, whereas the silicone blade is rigid and durable. This allows for a balanced and natural rhythmic kick and reduces calf muscle fatigue so you are less likely to experience cramping post swim. This fin also features grip nodules underneath to prevent slipping. The short blade means that even in busier swimming pools, you can focus on your kick technique without catching the blades on the environment around you.