An Almain rivet is a type of flexible plate armour created in Germany in about 1500. It was designed to be manufactured easily whilst still affording considerable protection to the wearer. It consisted of a breastplate and backplate with laminated thigh-guards called tassets.[1] Almain rivets were generally of fairly low quality, but they were cheap: a royal proclamation issued by Henry VIII in 1542 designated them at 7s 6d, which equated to one sixth of the cost of a suit of demi-lance armor.[2] Almain rivets were frequently purchased en masse as munitions-grade armour to equip royal armies or personal retinues.
The term rivet derives from the "overlapping plates sliding on rivets" characteristic of this type of armour.[3] Almain is an Early Modern English term for "German" (still used in some poetic and/or archaic senses), from the French alemanique, from the mediaeval Latin alemanicus, from Alemanni, an early Germanic tribe.[4] The term was introduced in about 1530 and remained in use until about 1600. Based on the term almain-rivet, the word rivet itself acquired a meaning of "armour", attested (rarely) during the mid-16th century.[5]