Material: woven nylon, canvas-like nylon.
Edges and holes are laser-sealed so all should be smooth. Hardware is kept in place by stitching. End pieces of the stitches can be melted and pressed flat with a small flame.
The buckle is attached with a push pin, so you can replace it with a buckle of your watch-brand.
Buckle and loops are 316L steel, brushed finish.
Length of the strap is 30 cm, thickness is 1.5mm