When sourcing sport kites, the frame material is the most critical factor; high-performance models should use carbon fiber or wrapped carbon tubes for a balance of stiffness and lightness, while entry-level models may use fiberglass. The sail material should be made of high-density Ripstop Nylon or Polyester (e.g., Icarex) to ensure tear resistance and UV protection. Additionally, verify the wind range specifications (typically measured in mph or km/h) to ensure the product matches the target market's local weather conditions.