This is the starter set you'll have if you decide to play as a Samurai. If you didn't start to play as a Samurai, you can buy this set from the Isolated Merchant (Dragonbarrow) in Dragonbarrow ...

Helm made from strips of iron fastened together. Worn by warriors of the Land of Reeds. The Land of Reeds has long been locked in a miserable civil war, during which time it has remained alienated ...