Sunray makes fly lines designed for euro nymphing in rivers. These lines have Kevlar cores that don't stretch, which helps anglers feel fish bites better. The zero-stretch core is important for euro nymphing because it allows for better contact with the flies and faster hook sets. Our nymph lines are thin to reduce drag in the water. They work well for casting light nymph setups accurately at short to medium distances. These lines help anglers keep better contact with their flies while fishing upstream, which is a key part of the euro nymphing technique. Sunray nymph lines are made to perform in different river conditions and can improve an angler's ability to detect subtle takes when euro nymphing.