That's a loaded question since there are a lot of different aspects to this costume. I used sintra plastic for the armour and a vinyl for the shirt/armour. It wasn't exactly an easy costume to make, so if you're unfamiliar materials/sewing I don't recommend it.
Yooo hoo this is sick man. I was just on a dude's facebook and I saw this Lin cosplayer and was like, "I swear I know this face." Well done guy. Fan Expo went good for me too! Holy cow, only two copies of my manga left!
Gorgeous! Love your pose and the location just adds to the costume! Really looks like something pulled straight from the cartoon. Lin and Republic city have become real here as far as I am concerned! haha. You look amazing!