Slow Intermediate Fly Line - SUPERFLO 40+ EXTREME - Airflo

Superflo 40+ Extreme - Slow Intermediate Fly Line - AIRFLO

The Superflo 40+ Extreme is Airflo’s ultimate “casting machine”. This Slow Intermediate (Slow Inter) version is designed to cover big distances fast while fishing the layer just under the surface.

Thanks to Superflo technology, this fly line features an ultra-thin running line that significantly reduces friction through the guides and increases the available capacity on your reel.

Its key feature is a short head profile of 10.6 m (35 ft), which loads the rod quickly - ideal for reaching long distances with minimal false casting and limited backcast room.

The low-stretch Power Core (6 %) ensures full energy transfer on the cast and outstanding sensitivity to detect the most subtle takes at long range.

Technical specifications

Model	Head weight	Head length	Total length
WF6	15.7 g(243 grains)	10.6 m	37.7 m
WF7	18.4 g (284 grains)	10.6 m	37.7 m
WF8	20.9 g (323 grains)	10.6 m	37.7 m

Detailed features

- Superflo technology: Ultra-smooth, durable coating, completely PVC-free, delivering superior shootability and exceptional UV resistance.
- Thin running line: Reduced diameter to maximize line speed and minimize friction.
- Power Core: Low-stretch braided core (6 %) for better hook-sets and enhanced feel.
- Sink rate: Slow Intermediate (0.5 ips), perfect for fishing just under the surface.
- Welded loops: At both ends for easy connections.
- Colours: Olive head / Sunrise running line (high-vis yellow).

Key highlights

- Effortless distance: Its short, heavy “Extreme” shooting head lets you deliver your flies beyond 30 m with ease.

- Record total length: At 37.7 m, this fly line gives you the reserve needed for the longest casts without hitting the backing.

- Superior durability: Superflo polyurethane won’t crack and requires virtually no maintenance compared to traditional PVC.

- Strike sensitivity: Feel the slightest buzzer take thanks to the very low stretch of the Power Core.

La Fine Mouche’s take: The 40+ Extreme is a true missile launcher. It’s the go-to fly line for the bank angler who wants to cast far with ease, even in tight spots. In “Slow Inter”, it’s brutally effective when fish are feeding very close to the surface.