a horse-tail helm

Plates and strips of metal have been overlapped and cleverly riveted together forming this magnificent horse-tail crested helm. Eyes and nose guards extend from the rim of the helmet, which sits just at the brow. Hand-hammered decorations run over the metal plates, forming fine ornaments. From atop the helm flows a white horse-tail crest.

It is a horse-tail helm (worn, seasoned).
It can absorb a huge amount of damage and provides excellent protection.
It is made of metal.
It is too big for you.
It weighs seven pounds.

You identify a horse-tail helm.
It is a piece of metal plate mail armour.
It absorbs 85% of damage points, up to 11.
It decreases offensive bonus by one.
It weighs six pounds and ten ounces, and it is worth about three gold and eleven silver.
Its keywords are helm, horse-tail, metal, and helmet.