amazon.com/green-nylon-high-visibility-led-waterproof-light-collar-medium/dp/b00nb6f4is/ref=sr_1_43/

Adjustable soft nylon for a comfortable fit.Durable and water proof for visibility in all weather conditions.Multiple lighting options for maximum visibility. Easy to keep an eye on your best friend when hiking off leash!Great for boating, rv trips, camping and home!