Translucent half round ribbing that has many uses for segmented bodies. D-shaped cross secion. The medium size is great for charlies, stones, and large nymphs. The nymph size is for small to medium nymphs and the midge for midges and small nymphs. Has just the right amount of stretch.
What's the difference between D Rib and Vinyl Rib? The material - one is vinyl. The stretch - D Rib will stretch down to micro size and maintain the D shape while vinyl is less flexible.