When evaluating branded caps, focus on fabric weight (measured in GSM) and material composition. For premium streetwear, 100% heavy brushed cotton twill is preferred, while polyester-spandex blends are ideal for performance headwear due to moisture-wicking properties. Ensure the buckram (the lining inside the front panels) is of high quality to maintain the cap's shape over time. Additionally, specify the stitch count for embroidery; a high density (typically 5,000 to 10,000 stitches depending on logo size) ensures the branding does not pucker or fray.