Power finAn essential training aid for your kit bag, these Arena Powerfin Fins are used by swimmers of all abilities to increase their strength and speed in the water. Available in a classic 'acid lime' green colour, these Arena swim fins feature a world exclusive aqua sole design for improved grip and superior propulsion. Made from 100% silicone to prevent blisters, the Arena Powerfin uses the natural resistance of the water to increase muscular activity.