When sourcing ripstop cotton, the most critical factor is the reinforcement technique. Ensure the fabric features a crosshatch pattern of thick yarns interwoven at regular intervals (typically 5mm to 8mm). You should verify the GSM (Grams per Square Meter); for tactical gear, a weight of 200-250 GSM is standard, while lightweight shirting requires 110-150 GSM. Additionally, confirm the tensile strength and tear resistance ratings (ISO 13937 or ASTM D1424) to ensure the 'ripstop' function actually prevents small tears from spreading.