Simple Design: This necklace has a simple design that is popular among men. A timeless design that creates a casual and stylish look. This accessory will go with a wide range of styles from casual outfits to slightly patterned styles Waterproof and Heat Resistant Material: The stainless steel material is extremely durable, so it can be used in bathrooms and rainy days. The most notable feature of stainless steel is corrosion resistant, so you can wear it even when you sweat. The English name is "stainlesssteel" and the original phrase means "never rust". It has excellent heat resistance, and generally does not decrease the tensile strength if it is not about 500 degrees Celsius Hypoallergenic: Stainless steel is a very low allergic material that is safe to wear. It is gentle on the skin, and does not cause allergic reactions, and can be used safely even by people with sensitive skin. (※There may be differences between individuals due to metal allergies.)