A Hindu wandering holy man

Took this photo of a Sadhu when i visited Kathmandu, Nepal, i was amazed of this holi man, and what catches my attention is the hair, it is never been cut and it is already wrap around his neck. Sadhu are any holy person in Hinduism and Jainism who has renounced the worldly life, it literally means one who practises a ″sadhana″ or keenly follows a path of spiritual discipline.