The distinctive features of a 3D digitally printed round-neck short-sleeved T-shirt with a black base and a skull pattern are as follows:

1. Unique Design: The use of a 3D printing technique allows for intricate and detailed designs to be printed on the fabric. The black base color provides a contrasting backdrop for the skull pattern, making it stand out and catch the attention of young people.

2. Trendy Appeal: Skull patterns have been a popular motif in fashion, particularly among young people. The edgy and rebellious nature of the skull design appeals to the youth, reflecting their individuality and non-conformist attitude.

3. Customization Options: 3D digital printing enables customization, allowing individuals to create personalized designs. This feature attracts young people who seek to express their creativity and unique style through their clothing.

4. Comfort and Versatility: The round-neck short-sleeved T-shirt is a comfortable and versatile garment suitable for casual occasions. The fabric used in 3D printing is often lightweight and breathable, ensuring comfort even in warm weather.

5. Technological Appeal: 3D printing is a cutting-edge technology that appeals to the younger generation, who are often early adopters of new technologies. Wearing a 3D digitally printed T-shirt with a unique design showcases their embrace of innovation and modernity.

In conclusion, the 3D digitally printed round-neck short-sleeved T-shirt with a black base and skull pattern is suitable for young people due to its unique design, trendy appeal, customization options, comfort, versatility, and technological appeal.