Finished with reflecting piping, the collar provides night time safety for you and your dog when walking in the dark.WaterproofEasy to cleanNon-rusting stainless steel D ring Reflective safety trim - for enhanced visibility at night Easy quick release buckle closure Non-corrosive Non-porous - drastically reduces odourID clip to securely attach your dog\'s ID tags Material: Neoprene / NylonSize: Large SizeNeck (cm)Width(mm)XS30-3316S34-3820M39-4425L45-5125XL52-6125For best fit, measure the neck of your dog. Fitted correctly, the collar should be snug and not too tight