Visible up to a mile away at night, this hi-vis collar is lightweight with a soft webbing inside the collar. It has a metal D-ring to attach the lead. It has an on/off switch for the flashing. Fluorescent and reflective, shockproof and water resistant. 100's of hours from the battery (included), the collar is also fully adjustable for extra comfort. Excellent when walking on the roads, even better when trying to find the dog in fields in the pitch black.