Which treatment for jet fin

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The Jetfins eventually lose their elasticity and soften up so that they bend without providing thrust as they virtually fold up with any stroke pressure. I have had a number of pairs of Jetfins, but they were long lived due to quality rubber compounds, anti-oxidant and in-built wax bloom protective agents that extended their life as much as possible. If they did not deteriorate then I would not have as many pairs. As for the trash can they would need to find room among all the cracked and split carbon blade fins and the delaminated multi-plastic component co-molded fins that are here today and gone tomorrow. Fins have become consumables as modern gear is on a trajectory to the rubbish dump or recycling facility in a much shorter period than it used to be.
 
https://www.shearwater.com/products/peregrine/

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