The Ledlenser NEO Run Belt is an accessory from Ledlenser's NEO running range, a stretchy belt made of polyester and elastane with polycarbonate parts and reflective print for visibility at night. Ledlenser lists it as compatible with its NEO running headlamps (NEO1R, NEO3, NEO5R and NEO9R), so it is meant to be used together with those lamps on night and trail runs. The maker gives no further description, so please ask us if you need to know exactly how it attaches to your headlamp before ordering.