The National Women’s Law Center has worked for 45 years to advance and protect women’s equality and opportunity, and has long worked to remove barriers to equal treatment of women in the workplace. Protecting against workplace harassment, including sex-based harassment, is key to achieving this equal treatment. We write to express our strong support for the Proposed Enforcement Guidance and believe it will promote the reduction of sex-based discrimination and harassment in the workforce. The EEOC last issued policy guidance on harassment in 1999; since then, the law has evolved significantly. One-third of all EEOC charges include an allegation of harassment, demonstrating the need for current and robust guidance for employers and EEOC investigators. We write to offer suggestions for further clarifying and strengthening the Proposed Enforcement Guidance.