As the nights grow longer we review the Petzl Iko Core and Swift RL to light up a bouldering session. Petzl have always been at the forefront of innovating headtorches, and today we have two to try out. The Petzl Swift RL and Iko Core are two very different head torches...but both have a huge amount of POWER. Get the Petzl Swift RL Petzl Iko Core From Darkness To Light: Petzl Headtorch REVIEW | Climbing Daily Ep.1755