Here's Jager in his combat armor from back in the war which he fought in and it includes a right arm shield, a helmet, a spike dome on his left shoulder, chest armor, hard underwear, and metal boots for heavy combat. Jager only wore it in ground combat because it's more effective than in aerial combat.

DISCLAIMER: my characters are fictional and live in their own world with its own lore, parts of which I do not support in the real world, therefore my intentions are not malicious.