Carhartt Lighted Collar - If you want a collar with the ultimate in nighttime visibility, this one's the pick of the litter. It features a built-in 3 mode red LED safety light to make sure your dog never goes unseen. It's also fully adjustable, and built with durable materials and a sturdy side buckle. Durable nylon webbing with duck canvas weave Plastic side buckle with built-in 3 mode red LED safety light for night time visibility Light is water-resistant and has changeable battery Reflective triple needle stitch for low-light visibility Fully adjustable Rugged slotted metal D-ring with tag holding capability Plastic strap keeper and adjuster