A brand new Euro nymph line from Scientific Anglers.

SA says:

Built to meet the needs of demanding anglers the Mastery Euro Tactical Nymph lines feature a braided core that minimizes memory and line sag, producing a more sensitive connection to your flies. Available in a level line which is the most efficient for tightline nymphing while remaining FIPS compliant and a double taper version with slightly more mass to allow dry flies to be cast when needed.

• Formulated with Advanced Shooting Techonology 
• Double taper version maintains .022” tip, but tapers to a slightly larger belly so that it can be overhead cast when needed
• Level .022” diameter, coated fly line for sag free, tight line presentations