When sourcing polyester bedsheet fabric, the price is primarily driven by GSM (Grams per Square Meter) and thread count. For budget-friendly options, a GSM of 60-85 is common, while premium 'microfiber' feels require 90-120 GSM. You must verify the finishing process (e.g., dispersed printing vs. pigment printing), as dispersed printing offers better colorfastness and a softer hand-feel, justifying a higher price point. Always request a fabric weight certification to ensure the delivered goods match the quoted specifications.