Loon Ergo All Purpose Bobbin Socks Simms' Lightweight Baselayer Bottom is

Simms' Lightweight Baselayer Bottom is the essential next-to-skin layer for building a rock-solid foundation that prioritizes all-day mobility

Core: 50lb Power Core (40lb on 300 grain)

and do battle

true 50 UPF protection

5mm neoprene

Loon Ergo All Purpose Bobbin Socks Simms' Lightweight Baselayer Bottom isFor tying flies of all shapes and sizesA great bobbin disappears in that a tyer can spend their time at the vise thinking about everything else. The Ergo All Purpose Bobbin is comfortable in hand, with a design and shape that makes it compatible with flies of just about every shape, size and style. It is difficult to find the boundaries of this bobbin, as it does just about everything. Iconic Loon Yellow powder coated handle Ergonomic shape Brass feet