I play every summer mainly with rackets in the sea... I bought them about 3 years ago, from a physical store for about 12€. Although the first year they got wet in the sea water, they lasted very well, with intense play, every summer... I was very satisfied!! This year the last one broke! (07/2021)
As for the bounce and elasticity of the material, I can say that I couldn't play with any other ball because they weren't as "accurate" in handling the game!