We’re excited to offer you one of the best fly tying materials for creating lifelike nymphs: Catgut Biothread. This exceptional material is known for its unique transformation from opaque when dry to milky translucent once wet. Its natural stiffness can make it slightly challenging to work with when dry, so we recommend wetting it before use.
To prepare it, simply soak the material in warm water for 3-5 minutes—only the portion you intend to use. The color will shift from opaque to a beautiful milky transparency, enhancing its natural effect.
When multiple threads of different colors are used, your nymphs will have subtle shading in the underbody, creating a stunning depth of color.
Catgut Biothread is truly a magical material, perfect for crafting durable and realistic bodies for nymphs and emergers. Its versatility and texture make it a must-have for any serious fly tier.
Catgut Info and Details:
- Length: Approx. 50 cm per bag
- Size L: For hooks #6 and #10
- Size M: For hooks #10 and #12
- Size S: For hooks #14 and #16
- Size XS: For hooks #16 and #22
- L = 0.7mm
- M = 0.5mm
- S = 0.3mm
- XS = 0.18mm
- Specially treated for long-lasting durability in water
Extra Info:
- Also used by traditional salmon fly tiers to make the loop for super flies (especially in size XS and sometimes size S).
Read and Learn:
Customer Reviews
5 Item(s)
- This makes realistic caddis pupa Review by Chris
Great material , it makes the perfect caddis pupa, I love the way you can get material that's not available in the Uk, don't be afraid to order from here because it arrives inside two days , from a good honest companyRating
Regards
Chris. (Posted on 2/13/2019)- It is a nice body material Review by Angelo
I use it for more than 2 years. All my flies are durable and looks perfect even today. I had a lot of trout on them and they still catch . Like it a lot ! (Posted on 1/29/2018)Rating - bellissimo materiale Review by Marco
il materiale e molto bello. Ho fatto alcune ninfe. Sono impressionato. Stanno guardando fantastico!Rating
Grazie! (Posted on 1/24/2018)- I love catgut Review by Andrea
Hi guys,Rating
here is my feedback about this material. I used it for different nymphs all my Summer. I had interesting results, sometimes I had days with huge success and other with zero attacks . I'm impressed about how this material looks when is wet. I catch fish where others not. Overall I like it more is better than latex or nymph skin. Is durable and is not affected by sun light. I tied a few jigs this Autumn and I had a few nice marmorata on them. I like it and I want to tie more flies with this material because became one of my favorite :) (Posted on 11/8/2017)- very nice material Review by Pablo
I tied a few pupa with this material and look all very juicy and realistic. Trout seems to like my new flies! Thank you! (Posted on 3/16/2017)Rating
5 Item(s)
