I was just going off of what CRL has listed.
for straps it just says "via soft straps" <--- that leaves a lot on the table, I can use the waistband stuff it thats what it takes to pass
and for belt it says "Belt proper is made of canvas, canvas covered material, leather, or vinyl, 3 to 3.5” wide. The color is be white to off-white."
Duck cloth is similar to canvas but its a little stiffer.