Armor Layers

Leather and chainmail armor are slept on and by the time they're available you already have iron or better My idea is to have that be an underlayer armor (like gamberson and chain mail was to plate armor irl) The damage reduction percentages would have to be reworked as well as designs to account for this. But we should be able to wear chain/leather armor under our gold/iron/diamond/netherite armor The percentages wouldn't have to perfectly stack but could be a multiplier for a partial buff. This would keep chain/leather somewhat relevant without overthrowing the top tiers