RSO, or Rick Simpson Oil is an extremely potent, concentrated form of cannabis oil with a thick, sticky, syrup-like consistency. It is produced by washing the resins off the plant material, using ethanol as the solvent, then filtering and boiling off the solvent. The oil left over is extremely high in THC. When warmed it will be viscous, but when cold it can be stiff and sticky like tar. RSO may be used topically/dermal application or ingested (either in a capsule or with food). Apogee's RSO is filled in a 1 gram syringe for easy application. Also available in 4g or 8g syringe.