Weighing only 79 grams, The IKO CORE features a patented AIRFIT headband that requires very little compression for a stable fit. Made of hydrophobic and semi-rigid materials the AIRFIT headband doesn’t absorb rain or sweat and is easily adaptable right out of the box into a freestanding lantern and is collapsible for storage. This 500 lumen headlamp is optimally balanced because of the rear-mounted battery pack and doesn’t require a bulky pig-tail cable. Sold with the Petzl CORE rechargeable battery, the IKO CORE is designed around the HYBRID CONCEPT that allows standard AAA batteries to be used without an adapter.