New and unused, but there is a crack. It is the upper part of the second photo. Thank you to those who understand. Lightweight and durable! Gentle on the skin Made with wetsuit material Uses wetsuit material on the inside, so it's gentle on the skin, lightweight, durable, and of course waterproof and dirt-resistant collar. Uses Velcro tape Allows for fine adjustment of size. Uses stainless steel D-ring Made with rust-resistant metal, all parts are made from the same raw materials as outdoor products. Accessory ring included For ID tags, lights, etc. Includes a ring to secure accessories. Reflective function included. Uses reflective material on the entire surface, so it reflects car lights even on night roads. Size M Size: 43 x 3.3 x 2.2 cm Weight: 120 g Neck circumference: 37-41 cm Width: 3.3 cm Suitable dog breeds: Medium-sized dogs Materials: Polypropylene, neoprene, metal fittings, etc. Thank you for looking.