They are unable to sweat, have small lungs in comparison to their body size and have a thick layer of fat that insulates them from the cold.
Ga di kgone go fufulelwa, di na le makgwafo a mannye fa go bapiswa le bogolo jwa mmele wa tsona, mme di na le boalô jo bo kima jwa mafura jo bo di sireletsang kgatlhanong le serame.