Ero CopperCorp. announced the results of its optimized Feasibility Study (the "2021 Feasibility Study") on the Boa Esperança Copper Project ("Boa" or the "Project"), located in Pará State, Brazil. Subsequent to the Effective Date, ten exploration drill holes were drilled within the Gap Zone, all of which show mineralization. To date, assay results have been received for three of these holes. Results are highlighted by hole BSPD-166 that intercepted 21.2 meters grading 0.98% copper and 15.3 meters grading 1.25% copper, including 6.5 meters grading 2.46% copper, hole BSPD-169 that intercepted 64.9 meters grade 0.86% copper, including 15.0 meters grading 1.40% copper and hole BSPD-175 that intercepted 14.1 meters grading 0.73% copper including 5.7 meters grading 1.59% copper. Additional mineralized intercepts from within these holes are pending assay results. Continued positive exploration results within the Gap Zone are expected to further enhance the Project by (i) confirming continuity of mineralization between near-surface high-grade zones and high-grade zones near the pit limits at depth; and, (ii) converting material currently classified and mined as waste into mineral resources. The Company expects the Gap Zone to contribute to increased copper production beyond year five of the mine plan. Gap Zone drill results outlined in this press release, including drill collar locations, are shown below in Figure 1 and can be viewed on the Company’s Boa Esperança project tour and interactive three- dimensional ("3D") model, which can be accessed via the Company’s VRIFY Technology Inc. (“VRIFY”) project. Gap Zone drill results from BSPD-166, BSPD-169 and BSPD-175, as referenced herein, reflects mineralization not captured in the Company's NI 43-101 (as defined below) compliant mineral resource and mineral reserve models developed for the 2021 Feasibility Study. There has been insufficient work and analysis surrounding Gap Zone drilling to define a mineral resource and it is uncertain if further exploration and analysis will result in such targets being delineated as a mineral resource. The center of the final pit design is located at UTM Easting 450722.00 and UTM Northing 9241657.00. Boa Esperança mineralization based on data compilation work which includes review of geological controls, structural analysis and copper mineralization identified during the Company’s technical programs. The interpretation and boundary limits do not imply continuity of mineralization or actual thickness of mineralization. Mineral resources which are not mineral reserves do not have demonstrated economic viability.