This leaf monkey lives in forests from southernmost Thailand across Peninsular Malaysia. Its greyish coat and long tail are noticeable features.
It has a slender build, grey to brownish-grey fur, pale cheeks and underside, and a dark tail. Juveniles have a spiky crown.
Groups include one adult male, several females, and their young. They feed on young leaf shoots, seeds, and forest fruits.
An extinction-risk assessment has not been added yet.