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Sempferfli UV Straggle String (Fine UV Straggle Fritz)
Sempferfli UV Straggle String (Fine UV Straggle Fritz)

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Price: £3.11

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At first glance Straggle String UV may seem like many of the other “fritz” type tying materials... Take a closer look though and you will find Straggle String UV  is a carefully developed fly tying material and NOT just another off the peg product poached from the textiles trade.


Finer core than typical “fritz” type materials

Widest range of natural fly tying colours available

Colours chosen by and dyed by the Semper Fli team

Coded colours to integrate with the Semper Fli dubbing system

Reduced fibre density (less like a blob more like legs or a hackle)

Reflective/refractive fibres provide insect-like iridescence

Subtle UV properties give the impression of life-like movement


The fact is it’s really up to you... but here are a few tips and tricks from the Semper Fli team to get you started.

The fine core means really slim bodies are possible. Try SF3300 on a curved hook for a fantastic bloodworm pattern or any of the natural colours under a shellback for a superb (and very quick to tie) shrimp.

Lower fibre density coupled with fine core makes great thoraxes for bead head flies.

The fine core absorbs much less water than standard fritz meaning Straggle String UV can be used in dry fly patterns

Finer material means smaller flies. Sizes 16, 18, and 20 can easily be tied.

The wide range of natural colours is great for imitating the natural invertebrates that make up fishes’ diet.

Bright and fluoro colours are great for “hot spots” or attractor patterns.

Natural colours coupled with Straggle String UV’s life-like illusion of movement means simple flies can be tied without the need for other materials. Check out the JP Straggle Nymph!  

What does the SF number Mean?
Semperfli has a dedicated colouring system with over 140 colours chips on  2 colour cards that can be laminated and used at the river bank to "match the hatch". Now for the first time ever you can match a massive range of flies to dubbing and other materials. However rather than name the colours we have given them numbers so SF0050 is the colour from the chip on the Semperfli card. This is to make it simpler for you long term, after all everyone has an olive material or dubbing in their tying boxes, we have 14 different olives colours alone! Try our card which is available for just £1.99 including post and packing, laminate it and take it to the river to match the hatch. You can then use this card at your local angling shop to match the hatch or use it to get Semperfli materials in exactly the colour you require, no longer do you need to guess which colour olive you saw at the river bank in preperation for your next trip!

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