Handwoven shirt from southern Mexico / Oaxaca

Beautiful blouse purchased from an art/clothing boutique in Yucatán. I was told that it was made in Oaxaca. Intricate woven stripes in soft pink and grey with orange, red, blue and green diamond accents along the bottom. A few loose threads in the armpits and a couple of other spots (I tried to photograph them all). Boxy fit. I’m a 34B and wear XS/S in most tops - this fits me loosely. See pics with measurements for details. I’m not sure of the material. Maybe cotton? It’s not itchy.