When evaluating rhinestone slippers, focus on the attachment method of the stones; hot-fix or machine-pressed rhinestones are generally more durable than manual glue-on methods. The upper material should be high-grade PU leather, microfiber, or satin to support the weight of the embellishments. For the sole, prioritize anti-slip TPR (Thermoplastic Rubber) or EVA with a thickness of at least 1.5cm to 2cm for comfort and longevity. Ensure the rhinestone grade is specified (e.g., AAA glass crystals vs. plastic) to maintain long-term sparkle.