Vireo RSO 1G Syringe Potent, full-spectrum relief in a convenient syringe. Vireo's Rick Simpson Oil (RSO) delivers a powerful dose of full-spectrum cannabis extract in a 1G syringe. Known for its therapeutic effects, RSO offers relief from pain, stress, and insomnia. The easy-to-use syringe allows for precise dosing, making it perfect for both experienced users and those seeking targeted relief.