The Pathos Fireblade freediving fin foot pockets, made up of 3 different compounds of vulcanized rubber, offers exceptional comfort combined with a lightness great (only 13 oz) in comparison to any shoe competitors. The spars are very thin to work well the blade, making them form almost a U-turn and then not too much strain on the leg, but at the same time have an excellent boost both in depth and on the surface on the go. The lightness creates an effect of strong relaxing with the shoe worn and not very muscular stress. The light weight is not synonymous with weakness, in fact, the rubber compounds used are the best on the market and in addition to the comfort they offer a great resistance over time.