HA Boliven Fluo 9cm is highly fluorescent and is a clear favorite in clear or glacier colored water and fish well all season. Preferably fish it with a sinking and quite slowly. A clear top three fly! Recommended hook size: #6-8 treble, #6 doubles, #4 single. Guideline HA is a salmon tube fly series designed and tested by renewed angler and fishing guide Hajas Andersson from Åre, Sweden. He works at famous Hembre Gård by river Stjördalsälven and his flies are produced and distributed exclusively by Guideline.