1.Please check the rope to see if it is cracked or knotted before using. 2.Don't dirty or stomp the rope; because this may cause the rope become fragile when using. So please erase the dirt after using it. 3.Don't wet the rope–the wet rope may become weighty and slip,which is hard to use. 4.Learn the rope's safety weight- bearing. 5.Avoid the rope get touch with sharp stuff- if you have to ,please cover the towel to protect the rope. 6.Don't lend the rope to others: It is dangerous to use the rope which has crack, and you don't know it. 7.Don't make the rope close to high temperature source.8.Please allow 1-3 cm error due to manual measurement. Thanks for your understanding.This rope can't be used anymore: 1.the scarred and rubbed rope should be replaced 2.The two years old rope should be replaced, the rope was ever used to save people who suddenly failing when climbing should be replaced