Enarmes are the leather

Leather

Leather is a durable and flexible material created via the tanning of putrescible animal rawhide and skin, primarily cattlehide. It can be produced through different manufacturing processes, ranging from cottage industry to heavy industry.-Forms:...

 gripping straps attached to the back of shield

Shield

A shield is a type of personal armor, meant to intercept attacks, either by stopping projectiles such as arrows or redirecting a hit from a sword, mace or battle axe to the side of the shield-bearer....

s throughout the Medieval period.

Enarmes represented a significant advance in shield technology, as beforehand shields were held by a single bar that ran behind a boss

Shield boss

A shield boss, or umbo, is a round, convex or conical piece of material at the centre of a shield. Shield bosses are usually made of thick metal but could also be made of wood. The boss was originally designed to deflect blows from the centre of round shields, though they also provided a place...

. Enarmes were held in place by riveting through the leather and the facing of the shield, and reinforced with small, square-cut washers. Enarmes are visible on shields in the Bayeux Tapestry

Bayeux Tapestry

The Bayeux Tapestry is an embroidered cloth—not an actual tapestry—nearly long, which depicts the events leading up to the Norman conquest of England concerning William, Duke of Normandy and Harold, Earl of Wessex, later King of England, and culminating in the Battle of Hastings...

.