The following details were found on the official site:Please note that due to the nature of the material of the strap, the underside looks and feels unfinished, please see photos for the strap material
“This style is unique to TRUSS and takes 1-2 days to weave and assemble by artisans in Mexico. Proceeds from your purchase aids in the development of artisan communities in Mexico and our work with the women's education foundation Fondo Guadalupe Musalem. Handwoven Plastic body with wide over the shoulder leather strap and drawstring closure. Unlined, waterproof. Protective bottom feet. All components are hand assembled in Oaxaca, Mexico.”