Could be a shiny polymer. Lightweight but resilient, and presentable.

The Pegasi are pretty advanced after all.

There is steel on his helmet, which is far more advanced than these helmets in the G5. Different helmets were seen in G4, but these are distinguished in two specific fields; these with iron color and these with gold color. Older helmet from wartime as in the episode “Hearth`s Warming eve” appeared to be composite made or of a piece of iron that had been hammered out. The Royal Guard in the time of Twilight Sparkles has gold color on its helmets, which appeared to be an alloy of bronze and gold. It is known elsewhere that gold can conduct magical power as well as with copper and electricity.
 
These guards look more like security guards or police officers than military guards, as their symbol is so prevalent on the equipment that is hardly anything other than the helmet and breastplate as on a horse called “peytral”. The Royal Guard in Canterlot did not have peytrals as part of its armor. Instead, they had shoulder protectors with possible attachment for spear / lance, which are attached at the front. An old criticism ever since “The Crystal Empire” is that one did not have protection on the chest region and neck region in front of a pony in armor. Only Sombra had it. Sombra had peytral and “crinet” which allows the spear and arrow to be reflected off, on a royal guard there are too many openings.
 
Om this guard that is more reminiscent of a gorget than a peytral, and may have served as a kind of police symbol as in the military police in several countries in our world (Feldgendarmerie), as a characteristic of which authority this guard represents. In Scandinavian countries, such gorgets are referred to as guard signs.
 
Which may mean that the two guards were actually more police than military.

This fellow looks pretty no-nonsense. Hopefully the G5 guardponies are a little more competent than their G4 counterparts.

@darkron  
Because the pegsus no longer get the metal from the Earth ponies.

why is my Armour worse then in G4?

Looks like he’s trying to look at something but doesn’t have very good eyes…somepony give him some glasses

I love him

This guard looks so done with everypony’s nonsense.

Him:My nose itchs but I can’t itch it until my shift is done in 6 hours.

Look at him! Trying to be intimidating.

The symbol on his armor reminds me a little the Lunar Republic symbol XD

Male Lyra.

6 hours 45 minutes to end of shift… 6 hours 44 minutes to end of shift

@Background Pony #9792  
Male Pegasus Lyra. Lyrasus

What do we name this guard who my go nameless in the movie?

That face says “I can’t believe I have to put up with this”