new and improved
While the SP lifespans using the Cleartone formula were scary good the new version of Lifespan are even better. I don't think they are using the Cleartone treatment but in fact using their own formula. I used plain phospher bronze for years then switched to the coated Elixir, but coated strings give my Martins a different sound, and I play Martin to have that Martin tone. So in this world of guitar playing I believe treated strings are hear to stay as another great option outside coated strings and regular 80/20, 92/8. It's just the best acoustic string on th market right now.