Lorica plumata
The lorica plumata (Latin: [loːr̺iːka pluːmaːt̪a]; Latin for 'feathered cuirass'), also called the lorica hamata squamatque (Latin for 'hooked and scaled cuirass'), was a set of Roman body armor. Unlike the more common lorica squamata, the scales of this cuirass bore a ridge down the middle, like a feather shaft, from which the name derives.
The lorica plumata was sleeveless and worn without spaulders (shoulder guards), resembling a linothorax. Due to its rarity and higher production and maintenance costs, it may have been reserved for higher-ranking soldiers, tribune or above. The lorica plumata would have been an expensive piece of military equipment. Unlike most contemporary Roman armor, it combined mail and scales.