What thread size should we use for military boots?
We recommend that as a minimum Gral/ Nylbond M30 is used on the upper. M20 will provide better seam strength. However, since military boots are used in wet conditions, Drybond GTX will provide comfort and dryness.
What SPI should we use to stitch adult uppers?
It depends on brands specifications, but generally major brands use range of 8-10 for adult upper shoes.
What is the difference in application between lubricated and waxed braids?
Lubricated braid is normally used on the machine, while waxed braid is generally for hand sewing.