Translucent half-round plastic nymph ribbing and body material that has many uses for segmented bodies. Soft and easy to work with. The large size (hook size 1-8) is great for large stoneflies, streamers and saltwater patterns. The medium size (hook size 8-12) for crazy charlies, stoneflies and large nymphs. The nymph size (hook size 12-16) is good for midge to medium nymphs and the midge size (hook size 16-20) for midges and small nymphs.