Rio’s Best Tropical Saltwater Floating Line
Description
RIO’s new flagship saltwater fly line has been designed for anglers hitting tropical flats in search of bonefish, permit and tarpon. The line is built on RIO’s new DirectCore, a proprietary low-memory, low-stretch monofilament core that retains its stiffness in tropical heat, yet lies straight on the water without curl or retraction. The core, which has 30% less stretch than regular tropical saltwater fly lines, ensures solid strip sets and shortened fight times.
RIO’s SureFire technology, previously used in their freshwater fly lines, is also incorporated into the Flats Pro line. This triple coil construction enhances line performance and durability in tropical conditions.
| Feature | Specification |
|---|---|
| Core Technology | DirectCore – low-memory, low-stretch monofilament |
| Stretch | 30% less than regular tropical saltwater fly lines |
| Performance | Retains stiffness in tropical heat; lies straight on water |
| Target Species | Bonefish, permit, tarpon |
FAQ
What makes the DirectCore technology different from standard saltwater fly lines?
The DirectCore has 30% less stretch and maintains stiffness in tropical heat, reducing curl and retraction on the water for more consistent casting and better strip sets.
Is the SureFire technology used in this line effective in tropical conditions?
Yes, SureFire technology enhances line durability and performance in tropical environments, providing improved resistance to abrasion and better handling during long casts.
Can this line be used for fishing in both shallow flats and deeper waters?
This line is specifically designed for tropical flats and is optimized for bonefish, permit, and tarpon in shallow, flat environments. It may not be ideal for deeper or more variable water conditions.


Sam Jones –
Used this line on a bonefish trip in the Florida keys. The line stayed straight on the water even in hot weather, and the strip sets were solid. No curl or retraction during casting. Great for flat fishing.
Michael Howard –
Felt a noticeable difference in line stiffness compared to my old saltwater line. The fight time was shorter, and the casting felt more predictable. Slightly more expensive, but worth it for tropical flats.
Alexander Gill –
Perfect for tarpon and permit on shallow flats. The SureFire tech helped with durability during long sessions. No issues with stretch or performance in high heat.