PIONEER Hiking Stciks Adjustable Retractable Anti-Shock Trekking Poles for Outdoor Walking Trekking Climbing (Blue) Anti-Shock on/off mechanism, which reduce stress on knees, thighs shoulders and lower back. Easy twist lock adjustment system. Durable, lightweight and highest strength 6061 aluminum with frosted effect. Weight: approx. 10.6 ounces(300g)/pole. 3-Section telescopic pole provides suitable flexibility. Adjustable length from approx. 25.6" to 54"(65cm to 135cm). Ergonomic Cork grip offers a maximum non-slip, comfortable, natural and warm handhold. Extended, lightweight non-slip foam grip. Adjustable wrist strap which is excellent and easy to use. Cetification: Eurofins,GS