Red Label (Super Sensitive)
What the manufacturer says:
Shawn Boucke - Site Director (3/9/14)
If you are using or have a student that has used Red Label strings these are a great next step without breaking the bank. They have a bit more warmth, a bit more flexibility, and a bit more color than its steel core counterpart. Because of the unpolished feel and lack of complexity I would hesitate to use this set for performing the Tchaikovsky Concerto in front of a 100 piece orchestra, but they hold true to their claims of being "Designed for students whose technique and skills have advanced beyond legendary steel core Red Label."