The Dakine Mission 'Noserider' is a very premium surfboard travel bag that'll fit longboard, mini-mals an funboard shaped boards. It's got a excellent padding and zip designed to ensure your boards rails are well protected.

Here's what Dakine have to say: 
"Tailor fit for longboards, the Mission surfboard bag protects your board for everyday transport. A full 10mm of foam padding means this bag doubles as an extended travel bag, too. The design and materials keep it light without compromising board protection or bag durability. Internal fin storage and an external stash pocket help keep you organized."