UTC Round Rib is a versatile fly-tying material perfect for adding segmentation, strength, and subtle shine to nymphs, dry flies, and streamers. Its round, flexible construction wraps smoothly around hooks, creating realistic ribbing that enhances durability while imitating natural insect segmentation. Ideal for mayflies, stoneflies, caddis, and even attractor patterns, Round Rib helps tiers build flies that are both lifelike and long-lasting.