Royal Wulff Braided Gel Spun Backing
New Braided Gel Spun (GSP) ultra thin backing is popular with saltwater fly anglers looking for a small diameter backing. Gives you more backing capacity.
Available in 20#, 30# and 50# test in a variety of spool sizes.
| Test Rating | Spool Size Availability |
|---|---|
| 20# | Various spool sizes |
| 30# | Various spool sizes |
| 50# | Various spool sizes |
FAQ
What makes Royal Wulff Braided Gel Spun backing different from standard backing?
The Braided Gel Spun (GSP) construction provides a smaller diameter while maintaining high strength and backing capacity, making it ideal for saltwater fly fishing where space and performance matter.
Is this backing suitable for use with spinning or fly rods?
This backing is designed for use with spinning rods, particularly in saltwater fly fishing setups where a thin, strong line is needed between the reel and the main line.
Can I use this backing with different spool sizes?
Yes, the backing is available in various spool sizes to match your reel setup.

Adam Hunter –
I’ve used this backing on my saltwater spinning rig for several months now. The thin profile helps reduce line drag and keeps the setup clean. It holds up well under heavy casts and has no visible wear. Great value for the strength and smooth performance.
Lily North –
The 30# version works perfectly with my 7’6″ spinning rod. It’s thinner than standard backing, which makes it easier to manage when casting in rough conditions. No issues with knot strength or durability so far.
Molly Oliver –
Switched from regular backing to the GSP version and noticed a clear improvement in casting distance and control. The thinness doesn’t compromise strength, and it’s easy to spool on my reel.