OPMS Silver Malay Special Reserve Kratom is an ultra-fine version of Malay Kratom, green vein strain. Effects include euphoric stimulation, sleep aid and sedation. Our OPMS Malay Special Reserve Kratom is an ultra-fine version of Malay Kratom. It’s a special green-veined Kratom, harvested from only the maturest trees by the indigenous people of Malaysia, who pick and choose only the very best for this special blend. Malay Kratom contains some of the strongest alkaloids in nature, including 7-Hydroxymitragynine and Mitragynine, which is why it’s such a popular, and potent, pain-reliever.