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Fanny Packs for Women & Men – Crossbody Belt Bag with Adjustable Strap for Travel, Workout & Hiking At Benma, we believe a bag should move with your life — not slow it down. That’s why our premium Tyvek fanny pack is built to be water-resistant, feather-light, and endlessly versatile. Whether you're biking through the city, traveling abroad, or heading to the gym, this bag is your go-to for organized freedom.