Red Kalimantan is a type of kratom, a tropical evergreen tree native to Southeast Asia. Kratom leaves are used for medicinal and recreational purposes, and Red Maeng Da is one of the most popular strains.

Red Kalimantan is known for its potent effects, which can vary depending on the dose and individual. It is typically described as having a strong, uplifting energizing effect at lower dosages, and a sedative and relaxing effect at higher dosages. It may also provide pain relief, anxiety relief, and a general sense of well-being.