A round neck cotton T-shirt is a popular and versatile type of clothing. It is typically made from cotton fabric and features a round neckline, which is also known as a crew neck. Here are some key characteristics and information about this type of T-shirt:

1. Fabric: Cotton is a common choice for T-shirts because it is breathable, comfortable, and soft against the skin. It allows air to circulate, making it suitable for warm weather.

2. Neckline: The round neck, or crew neck, is a circular neckline that fits closely to the base of the neck. It is a classic and timeless design that works well with various outfits.

   1. Comfort: The softness and breathability of cotton make these T-shirts comfortable for everyday wear. They are often used as casual wear or as a base layer under other clothing.

   2. Maintenance: Cotton T-shirts are relatively easy to care for. They can typically be machine-washed and require minimal special care. However, it's essential to follow the care instructions to maintain their quality and color.

   3. Color Variety: These T-shirts come in a variety of colors, allowing you to choose the one that best suits your style and preferences.

   4. Unisex: Round neck cotton T-shirts are typically unisex, suitable for both men and women. They are available in different sizes to accommodate various body types.

   5. Layering: These T-shirts are often used as a base layer in cooler weather. They can be worn under sweaters, jackets, or other clothing to add an extra layer of warmth.

   6. Customization: Some people like to customize their round neck cotton T-shirts with unique designs, logos, or text for personal or promotional purposes.

   Round neck cotton T-shirts are a wardrobe staple for many individuals due to their comfort, simplicity, and versatility. They can be found in a wide range of price points, from affordable to high-end, depending on the brand, quality of cotton, and any additional features or designs.