Climbing ropes and cords are the most vital part of climbing gear and correct selection deserves careful thought. These climbing ropes and cords are your lifeline in the mountains, so selecting the right type and size is of the utmost importance. Climbing ropes and cords come in two types: static and dynamic. This refers to their ability to stretch under tension. A dynamic rope is most useful for climbing. You should be careful to in selecting a rope for climbing and factors such as its elasticity, strength, resistance power should be taken into consideration. Cord is a small diameter rope and is very necessary for the rock climber. Its many uses make it a valuable piece of equipment. To tie knots, a cord is used rather than a rope because of its small diameter.