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I built a spreadsheet last month. I'm a data person — when I have a problem, I research it to death. The problem: bladder leaks since perimenopause hit at 47. The research project: which "leakproof underwear" brand actually works. I bought a pair from every major brand on the market. Knix, Thinx, Speax, Everdries, and Haven. Same size, same style as close as I could match. Then I tested them on five criteria over 8 weeks: 1. Real-world absorbency (not the "water demo" they show in ads — actual urine, actual real-world use) 2. Durability (after 10 wash cycles) 3. Material safety (PFAS testing, OEKO-TEX certification, ingredient transparency) 4. Real-wear comfort (does it feel like underwear or a diaper?) 5. Customer service (how do they handle returns?) Here's what I found: Knix ($35-45/pair): The gusset is decent for light leaks but not great for moderate. Seams started separating around wash 6. Customer service was slow. They refused to honor my return because I'd worn them. Thinx: I almost didn't include them after the PFAS class-action lawsuit. I tested anyway. They feel okay, but I won't put them on my body knowing what was in the older versions. Trust is gone. Speax ($30+/pair): Genuinely soft, but the absorbency is much lower than advertised, and they're "air dry only" which is a deal-breaker for me. Everdries ($12/pair bundled): Don't waste your money. Plastic feel, zero real absorbency, the seams unraveled by wash 4. The 2.1-star Amazon rating is accurate. Haven ($18-22/pair bundled): This is the only one that earned all 5 categories. Sewn seams (not glued). PFAS-free, OEKO-TEX certified — the only brand that volunteered the lab certs. 10+ teaspoons real absorbency. Machine wash AND machine dry. 60-day Wear & Wash Guarantee — they actually let you wear them, wash them, and still return them if they don't work. I'm 8 weeks in. They've been through 30+ wash cycles. No degradation. No leaks. No regret. If you're researching this and you've gotten this far in my post, save yourself the time. Skip the spreadsheet. Try Haven first. They have the guarantee that makes it actually risk-free. Wish I'd done this 3 years ago.