Note: this product cannot be shipped by air. Only ground shipping is available. Your performance should be the only thing blistering, not your fingertips! This string spray allows for much smoother guitar playing, letting your fingers Glide without friction along the strings. Cuts down on cuts, scrapes and sore fingertips - not to mention fudged notes or lines. Best of all, finger-ease does all this without mucking up or damaging your strings or fretboard.