With carbon, aluminum and Shocklight, the REI Peak UL Shocklight poles are some of the lightest, strongest trekking poles out there Theyre made for minimalist backpackers and adventure racers. Upper and middle sections are small-diameter carbon fiber, creating ultralight poles that damp vibration and retain strength over a wide temperature range. Titanal aluminum lower section adds durability Titanal aluminum is one of the strongest aluminum alloys around and offers mechanical properties comparable to steel. Shocklight shock absorbers weigh less than common spring-loaded poles and wont rattle within the shaft as you walk. Shock-absorbing poles reduce fatigue while improving stability lockout mechanism creates a rigid pole when needed for more efficient climbing. With the new Stop Lock system, poles wont come apart system makes the pole sections into 1 unit for security and stability. DuoLocks extra-strong internal locking mechanisms apply a wide area of pressure against pole walls to lock in length adjustment. Reliable DuoLocks enhance stability and makes length adjustments easy. 3-section telescoping poles extend to a maximum length of 55 in. and compact to 27 in. for easy storage and transport. Ultralight EVA foam grips with an ergonomic, contoured shape and adjustable padded neoprene wrist straps provide miles of comfort. Fitted with trekking discs and extra-durable tungsten carbide tips included tip protectors are strictly for travel/packing protection, not intended for hiking.