SA Mastery MPX Floating Fly Line
Built a half-size heavy, the SA MPX taper starts where the GPX left off. Redesigned with more mass toward the front of the head, the MPX provides the same benefits of the GPX, with an added emphasis on presentation. The power is still there, only with an added bit of finesse.
- The ultimate general presentation taper
- Improved version of our GPX taper
- Built a half-size heavy to load rods and turn over large flies easily
- Excellent with dry flies, nymphs, and streamers
- Features the ST+ slickness additive
- For use in moderate and cold climates
- Braided multifilament core
- Product packaging may be different than pictured
- SA Line ID
- Welded Loops on both ends
| Specification | Detail |
|---|---|
| Line Type | Floating |
| Weight | Half-size heavy |
| Core Material | Braided multifilament |
| Special Feature | ST+ slickness additive |
| Best Use | Dry flies, nymphs, streamers |
| Climate Suitability | Moderate and cold |
| Ends | Welded loops |
FAQ
What makes the MPX different from the GPX taper?
The MPX has more mass concentrated toward the front of the head, improving presentation while maintaining the power of the GPX. It’s designed for better finesse when casting large flies.
Is the MPX suitable for cold water fishing?
Yes, the MPX is specifically designed for use in moderate and cold climates, making it effective in lower temperatures.
Does the MPX have any special coating or finish?
Yes, it features the ST+ slickness additive, which enhances glide and reduces friction on the water.



Trevor Rutherford –
I’ve used the MPX for several weeks now and it’s been a game changer for my dry fly and nymph presentations. The front weight helps with casting large flies without losing control. The line feels smooth and stays on the water well, especially in cooler weather.
Carol Martin –
The MPX is a solid upgrade from the GPX. It’s easier to cast and the line holds its shape better. I use it mostly for streamers and dry flies, and it performs consistently in the field.
Sarah Baker –
Great for anglers who want more finesse without sacrificing power. The slickness additive makes a noticeable difference in how the line moves through the water. Very reliable in cold conditions.