When one hears of afterlife / death sightings of their relatives , they are seen with no shoes as the funeral homes do not place shoes on the bodies if fluid is put in them, since this fluid builds up and collects in the feet, hence no shoes and in some cases no socks either .
Located this information:
The fluid that is injected into the blood vessels of the cadaver is up to 5% formaldehyde while the fluid injected into the body cavity is up to 37%.