An article on a carp rig called "the one up" hair rig or otherwise known as a popup hair rig, detailing: the rig, how it works, how to make it and an underwater photo of the rig in action.
The one up rig is a hair rig with a one
ended hair attached to the hook. The technique involves placing a popup
boilie on the end of the hair.

The one up rig presents the bait to carp
as an individual offering by floating a popup boilie a few centremeters
above the bottom.
When the carp sucks the boilie into its mouth, it will either swim off with
the bait and by doing so will hook itself or it will try to spit the bait
out and by doing so should accidently hook itself.
What you need:
- 10lb braid or mono
- 3lb braid or mono
- swivel
- hook – size 6 - 8
- rubber tubing
- Glue
Making the hair rig:
- Cut a 30cm piece of the 10lb braid/mono
- Tie one end of the braid/mono to the swivel
- Cut one small 7mm piece of rubber tubing
- Slide the piece of tubing onto the 10lb braid/mono
- Tie the end of the 10lb braid/mono to the hook
- Cut a 5cm piece of the 3lb braid/mono
- Tie a loop at one end of the 3lb braid/mono – this is your hair
- Tie the end of the 3lb braid/mono that does not have the loop to the hook eye
- Slide the piece of rubber tubing along the 10lb braid/mono over the hook
eye
- I usually put some glue on the hook eye and then slide the rubber tubing
over the hook eye.
You now have a one up popup hair rig.