1.【Comfortable】 - The wide soft mesh padding and ergonomic design make this nylon dog collar is comfortable and does not cause wear on dog's fur or skin. 2.【3M REFLECTIVE MATERIAL】 - Nylon webbing with 3M reflective material ensure good visibility and safety at night on the road.This Padded collar is chosen of toughness and durability reflective nylon webbing, neoprene padded material with sturdy buckle. Let your pet stay safe and be seen on your walks in the dark. 3.【EASY TO USE AND WASHING】- Easy to wash and clean our nylon collars for dogs are perfect for daily use. 4.【Adjustable size buckle】-The adjustable system is convenient to adjust the neck circumference, saving time, durable buckle design, easy to put on and take off, strong and durable. 5.【SIZE】 - Please measure your pet's neck with a tape, it would be better to set aside 0.7-1.1 inches(2-3cm) to be sure there is enough space for your pet breath freely. Size XS: 11.8"-13.8"(30-35CM); Size S: 13.8"-15.7"(35-40CM); Size M: 15.7"-17.7"(40-45CM); Size L: 17.7"-19.7"(45-50CM).