Fulling Mill Ultra Dry Yarn..https://www.fullingmill.co.uk/Products-UK/Tying-Materials-Ultra-Dry-Yarn-UK/Ultra-Dry-Yarn-White-UK
Materials Used;
Hook, Fulling Mill Ultimate Dry size 20
Threads, Uni8/0 Olive Dun and Gray
Tail, Microfibets
Body and Thorax, Ultra Dry Dub Light Olive
Wing, Fulling Mill Ultra Dry Yarn Brown Dun