GildanMen's V-Neck T-Shirts, Multipack, Style G1103OEKO-TEX STANDARD 100

Are they a thin cotton t or thicker?

Are these made from a continuous loop of jersey material or do they have side seems?

What are the colors in the 5pk. In writing says black and grey but the picture i see different

Hola son talla completa o quedan olgadas en el cuerpo ? Gracias