The Cypres loop was designed for reserve use only. This loop allows a quick container opening after the loop has been cut. These features fit perfect for reserve containers where you have a high pressure for a long time on the ripcord pin. The tensile strength is around 180kp. This requires careful acting from the rigger.
Reserve pull up's have to be extracted very slowly and only from below the ripcord pins.
Main container loops have a different task. Sometimes the container has to be closed very quick that not always happens very gently. The reduced tension on the closing pin with a Cypres loop may make a main container open earlier than expected. SPSJ Home Dedicated to enhancing sport parachuting safety by disseminating information about equipment, environments and human factors. You may like these products.