The EXEL TravelFit Nordic Walking poles are adjustable in length. Equipped with comfortable patented Nordic Walking straps, durable carbide metal tips for off-road use and removable natural rubber boot-shaped Nordic Walking fitness tips/asphalt paws for hard surfaces. These EXEL poles fit into backpacks and most smaller suitcases - many twist-lock and flip-lock poles do not. The EXEL TravelFit poles conveniently collapse down to 28.5 inches. Twist-lock and flip-lock adjustable length/telescoping/collapsible poles are NOT recommended for everyday use. Collapsible poles tend to vibrate, rattle and can collapse unexpectedly. The Exel TravelFit poles out perform the cheap/flimsy twist-lock and flip-lock poles from China, but do NOT perform as well as our SWIX and EXEL one-piece poles. WARNING: Seniors and individuals with balance issues should NOT use 2-piece and 3-piece twist-lock or flip-lock adjustable length/telescoping/collapsible poles! They should only use quality one-piece poles.