When evaluating Anion Sanitary Napkins, focus on the Anion (Negative Ion) Strip concentration, which should ideally range between 5000 to 6000 ions per cubic cm to effectively inhibit bacterial growth and neutralize odors. The absorption core should utilize High-Quality SAP (Super Absorbent Polymer), preferably sourced from reputable global suppliers (like Sumitomo), to ensure an absorption rate of at least 30-50 times its own weight. Additionally, the top layer must be Non-woven or Hot-air through fabric for maximum breathability and skin-friendliness.