Fair enough, but the point is that as far as combat damage goes that's pretty insignificant. Although when it comes to bows, well, apparently the Conquistadors eventually dropped their breastplates as excessive and started using the native quilted cuirasses instead; stopped arrows and the assorted obsidian-edged weaponry well enough presumably, and I'd guess the multiple thick layers of textile ate most of the impact power of the slingstones as well.