The netting that knights wear under their armor is called a "gambeson." It is a padded garment made of layers of fabric, often filled with material like wool or linen, which provides cushioning and protection against the impact of blows. The gambeson also helps to absorb sweat and improve comfort when wearing metal armor. Additionally, it serves as a barrier between the skin and the armor, reducing chafing and injury.
they wore good armour
They wear shiny armour.
a helmet, shin guards silver armour, a shield and a sword
heavy armorIn medieval times, knights wore armour when going in to battle.
armour
It's called a 'suit or armour'. Mediaeval knights wore such gear.
A medieval knight wore armour to protect them in battle so they didn't get hurt, though chain mail can be pierced so the came up with armour plating to protect the knight further. Thought with all these men in the same looking armour it was hard to tell friend from foe so the began to engrave the armour with the knights specific heraldry shield so it was easier in battle to tell who to save and who to kill.
Knights on horseback were like a tank to the middle ages. They had horses that were trained to carry a man in armour and to be controlled with the knees. They would form a line knee to knee and with the full armour they were very powerful.
knights wear armor such as mail that protects their upper half
Armour called a "Champron" covers a horses head/face. The complete horse armour is called a "Barding".
armour
Elite Black Armour is a possible drop from Elite Black Knights, requiring you to have at least started the quest While Guthix Sleeps to encounter. It's possible to obtain and wear this armour through the Grand Exchange without even starting the quest.