PeeWee Saddlery Easy Grip Biothane Eventing Reins
Incredibly grippy yet flexible and floppy in your hand.
Stays grippy even when wet, so perfect for eventing or hunting.
Very little bulk in your hand, and no bobbles so these don't shred your gloves.
Have to be tried to be believed!
Available in black and brown. Photos don't do them justice, so have a look at the video of them here