Blue Wing Olive - Thorax

The Blue Wing Olive – Thorax is a classic Catskill modification of the BWO dry fly and a must-have addition to your fly box. Available in sizes #12 to #22.

Blue Wing Olive – Thorax

The Blue Winged Olive - Thorax, an old Catskill modification of a BWO dry fly, is a “must have” pattern in your fly box.

Sizes: #12 - # 22