Unlike our Reflective collars the Glow collar absorbs light from any source, and will glow in the dark for up to 30 minutes. They reflect as well and are ideal for seeing your dog in fields or wooded areas when out walking. The collars are available in 30.5cm (12″), 41cm (16″), 51cm (20″) and 61cm (24″) the highly effective glow material is stitched along the middle of Polypropylene webbing and finished with stainless steel Delrins and Nato Spec plastic clips. From the size chart below please choose the appropriate size.