The Leki Corklite Antishock Trekking Poles features a combination of Leki's Speed Lock System which provides for easy adjustment and a twist lock. The Soft Antishock System - Lite (SAS-L) is integrated into the lower shaft of the pole, reducing the packing/swing size by 50 mm. The optimized packing size increases your freedom of movement in trekking or when transporting your poles. The impact energy is absorbed directly into the lower shaft. The ingenious combination of steel spring and soft elastomer provides precise synchronization between spring strength and compression; making trekking with poles more comfortable than ever, further reducing stress on your body joints, muscles and ligaments.