Elixir Strings Acoustic Phosphor Bronze with NANOWEB Coating deliver distinctive phosphor bronze warmth and sparkle together with extended tone life.#1 acoustic guitar string*Only coated string brand to protect the entire string with an ultra-thin coating, keeping gunk out of the gaps between the windingsExtended Tone Life players report their tone lasts longer than any other string, uncoated or coatedConsistent performance and tone ready to play whenever you areSmooth feel that is easy on your fingers and enhances playabilityReduces finger squeak good for both performance and recordingAnti-Rust Plated Plain Steel Strings resist tone-deadening corrosion, ensuring a longer life for entire setWith less hassle and expense of frequent string changes, spend more time making music