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![100% Silk [TEX-27] (100m-109yd) - Zipper and Thread](http://zipperandthread.com/cdn/shop/products/CL-XXXS-f031a929-4712-45c4-abb9-45d3ff11b38d-_1_350x.jpg?v=1678126528)
TEX [27~38] Medium Weight Thread
Thread Size(TEX) 27 ~ 38. Medium thickness.
TEX [40 and higher] Heavy Weight Thread
Thickest thread that is normally used for jeans' stitch, outdoor gear, leather stitch. For the heavy duty.
TEX [8~26] Light Weight Thread
Lightweight threads on the other hand (usually, user space threads) have much less context. (They essentially share the same hardware context), they only need to store the context of the user stack, hence the time taking to switch lightweight threads is much shorter.
Thimbles | zipper & thread
To protect your finger when you sew, Clover and Dritz provide many options for size and material.
Thread for Leather / Suede
Bonded Nylon by Sil Thread Inc. , King Leather by FUJIX, Mara 30 by Gutermann, and Perma-Core by A&E
