I study here http://www.sniderscyclery.com/?sildisoft-100-mg.pdf sildisoft 50 The total reserve stretches across 139,000 acres (56,259-hectares) of mountain tops and valleys, but less than one-third of that is in the highly protected core zone; 105,000 acres (42,707 hectares) are in the less-protected — and often deforested — buffer zone, where businesses, housing and extensive roads are allowed.