Elixir's special string coatings protect not only the outer string surface, but also the gap in between the windings, which is usually where that pesky tone-deadening debris builds up over time. 12's are perfect if you still need power from your acoustic tone, but but don't like the stiffer feel of 13's.
These particular strings have been constructed with high-quality phosphor bronze wrap wire, and are perfect for your acoustic guitar. They deliver a full-bodied tone with a sparkling high-end clarity, not to mention the supremely smooth feel that you've come to expect from Elixir's Nanoweb coated strings.
Acoustic guitar strings constructed with phosphor bronze wrap wire
Played for a dynamic balance of rich, full-bodied tone and sparkling high-end clarity
NANOWEB Coating provides a smooth feel and protects against common corrosion and debris buildup, extending tone life longer than any other brand’s coated or uncoated strings (Elixir Strings player survey)