We use the term 'ritual' here in a loose sense to describe drums which are often in the context of a celeberation, ceremony or spiritual journey. They can include Native American style Buffalo drums, and others variously described as Shaman drums, Shamanic drums, Tribe drums, Gathering drums, Sweat lodge drums and Thunder drums.
Drums such as these are often skinned with natural hide, but Remo Buffalo drums have synthetic skins which do not 'sag' in wet weather or in steamy sweat lodge conditions.
They are also perfectly suited for more mundane musical purposes!