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Details updated 5 Oct 2026
🛡️ Up to 12-hour leakproof protection with Anti-Leak Tech 🌙 Full-brief heavy absorbency for heavier menstrual flows ♻️ Reusable period underwear for comfortable, confident everyday wear (1 pair, size 18) U by Kotex Thinx Period Undies in the Full Brief (Heavy) style deliver reliable, all-day protection for heavier flow days. Designed with targeted absorbency and Anti-Leak Tech, these reusable period underwear help you feel secure from daytime to overnight—so you can choose a comfortable alternative to disposable pads and tampons.
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