 The Zulu serotine is a very small microbat, with a head-and body length of about , a forearm length of about , a wingspan of about and a weight of between .The fur is soft and dense, and longer on the rump than elsewhere.The dorsal surface is medium brown, the hairs having brownish-black shafts and medium to pale brown tips, while the ventral surface is a paler, greyish-brown, the hairs having dark grey shafts with paler, greyish-brown tips.