Feathers.

Sometimes I' m forced into shooting vanes when vane fletched arrows is all that' s available in the size I need and I' ll shoot them until the vanes are screwed up. Shooting nice, tidy groups or getting stuck in a group of nock-aimers at a 3D, it doesn' t take long at all to get a dozen vane fletched arrows to needing a re-fletching. I always go back with feathers.

Feathers are more durable, lighter (better FOC and a bit faster arrow speed over normal hunting yardages), less critical of riser/rest contact. The only thing vanes have going for them is they are waterproof. Some say they' re quieter in flight than feathers are, but that' s open to debate.