Look into paintball gear. Lots of places sell padded shirts, padded shorts with thigh protection etc.
E: As for the neck area... No clue really, maybe a shemagh style scarf on the outside, with some foam padding stitched in.
Baggy paintball trousers (or pants as the Americans say) generally have padding throughout.
But ‘training’ paintball trousers are likely to be just as thin as combat trousers, and slim fit non baggy paintball trousers have little or no padding.
Paintball ‘jerseys’ come with various levels. ‘Training’ jerseys again will just be a thin layer.
The main ‘playing’ jerseys come with various levels of padding. My ‘proper’ jerseys are from Jerseys Clinic in Poland and were their ‘Level 3’ I think, and would now be the equivalent to their ‘Hyper Pro’
These will be in modern breathable materials, so when worn loose have a good balance between the thickness and breathability / airflow to avoid overheating.
You can spend a lot or a little on these.
You can have an off the shelf design for the cost of the item, a ‘semi custom’ based on a preset design plus your options to personalise with logos etc. Or you can have your own fully custom / branded team pattern & design - but that takes set up costs. It’s value for money if buying a teams set of branded jerseys, and even better if you buy more of the range, eg jersey, hoody, t shirt ....
Paintball bounce vests are passed underwear. They have thick padding for sensitive areas such as your chest.
These get hot and sweaty.
I would only wear a bounce vest in the few games I actually played competitive tournaments and when photographing tournaments.
The main purpose of a bounce vest for a tournament player is to soften the impact of any paintballs hitting their chest from the far end of the field at the start buzzer, when they are exposed. Softer impact = less likely to break before you make the run to your first position.
My purpose as a photographer was because I’d lean my body in to catch the action and end up being shot constantly
Slide shorts have padding in the crotch but most of their padding is on the thighs etc. These are designed for those people who dive and slide around on the ground
The best option is loose clothing that absorbs most of the impact when yin are hit.
