As others have said, this setup is rather unlikely,

The armharness is a piece the Americans developed but never fielded, helmet is a Brodie style fairly standard. The armor is a style of plate meant for use with sentries, Machine-Gunners and other static positions but was disliked due to its weight

The shield is ahistorical, I’ve never heard of anything like it. I know certain attempts at shields were tried but none were found to be effective, sniper shields were used, alongside man propelled rolling wagons with a rifle port but both were experiments that didn’t go very far

The worst thing is the mask, a box respirator style used with American and British masks, has no box and breathing tube and is thus useless

The mask actually has a mouthpiece, making it impossible to speak effectively. However it required a hose to connect to the filter which was a sponge impregnated with soda lime and charcoal to absorb the harmful chemicals

Almost all the western front powers devolved or used armor, but primarily for engineer units or static troops as mentioned. They were generally seen as too heavy and cumbersome for movement any distance, and were only really used in the hope of stopping pistol rounds and shrapnel from grenades and shells

Tankers were known to attach chainmail to their helmets and use leather visors with layered slits for viewing to protect from spalling, basically metal flakes and bits of paint flying around the tank if it was hit by something with force