LEKI Summit Antishock Trekking Pole Designed for control and support; 80 percent natural, ground cork for comfort and durability Expander locking system: LEKI's original expander locks offer quick, easy length adjustment and secure hold Triple spring system: integrated anti shock spring to cushion pole plants on hard surfaces Concave, cylindrical carbide tips offer secure hold on all terrain and surfaces Auto comfort strap adjusts without the use of buckles and is lined with a soft, wicking material that dries quickly