"Caligae" would have been cooler on the march than enclosed boots. In warm, Mediterranean climates, this may have been an advantage. In northern Britain's cold, wet climate, additional woven socks or raw wool wadding in winter may have helped insulate the feet; but "caligae" seemed to have been abandoned there by the end of the second century AD, in favour of civilian-style "closed boots" ("carbatinae"). By the late 4th century, this seems to have applied throughout the Empire. The emperor Diocletian's Edict on Prices (301) includes set prices for footwear described as "caligae", but with no hobnails, made for civilian men, women and children.