LEKI Nordic Walking Instructor (Lt Blue) Trekking Pole Adjustable, releasable trigger energy+30 strap offers superior support and the convenience of a releasable system Super lock system (SLS): the strongest pole locking system available as tested by TUV Specifically designed to provide traction needed for nordic walking technique on pavement and smooth surfaces Cylindrical tips offer secure hold when nordic walking off road, all terrain and surfaces Sizing - fully adjustable size range of 100 - 135cm fits walkers of all sizes and ages