Core Craftsmanship: The Devil Hidden in the Details

1. The special craftsmanship of leather jackets

• Thinning process: Overlapping areas such as leather edges, pocket flaps, and collars need to be thinned to 0.5-0.8mm using a peeling machine to reduce bulkiness. Hand peeling requires extremely high control of force; a mistake will ruin the entire piece.
• Edge painting and edge sealing: The exposed leather edges need to be repeatedly coated with edge paint and polished to form a smooth and rounded edge seal. Top-level craftsmanship can achieve a mirror finish and is not prone to cracking.
• Perforation and stitching: Leather stitching requires the use of special thick thread (such as nylon or waxed cotton thread), with a stitch density of 8-10 stitches per inch. Critical stress points (such as shoulder seams and armholes) require backstitching for reinforcement. Saddle stitching is stronger than machine stitching because each stitch is individually knotted.
• Zipper installation: Heavy-duty zippers are required for leather jackets, and a leather lining should be placed under the zipper during installation to prevent stretching and deformation. Concealed zippers are even more difficult to install.

2. Exquisite craftsmanship details of the fabric jacket

• Lining construction: High-end jackets often use skin-friendly and breathable materials such as cupro and Bemberg for their linings. The lining must be sewn separately from the outer fabric, and allowance for movement should be left at the hem and cuffs. The inner pockets of fully lined jackets should be bound to prevent loose threads from showing.
• Pocket making: Patch pockets require double-layered fabric, with a 0.3cm topstitching for reinforcement at the opening; welt pockets (such as suit pockets) require hand-locked buttonholes, with the pocket lip width accurate to the millimeter; zipper pockets require an anti-pinch lining inside the pocket fabric.
• Quilting: Used for warm jackets (such as down jackets and quilted cotton coats). Quilting lines must be even and straight, and the filling must be evenly distributed to prevent down leakage. High-end custom designs may use a "compartment" structure, where partition fabric divides the filling into individual compartments to prevent cold bridging.
• Ribbing and Groove: The ribbing on the cuffs and hem should be in the same color family as or a contrasting color to the main fabric, and the elasticity recovery rate should meet the standard. Inferior ribbing will loosen and deform after a few wears.
• Custom jacket embroidery: Embroidery is another hallmark of personalization. Whether it's a brand logo, a squadron patch on a custom bomber jacket, or a monogram on the chest, custom jacket embroidery​ requires precise digitizing, high-quality threads, and skilled operators to ensure crisp, durable results.

3. Hardware and Accessories: The Finishing Touch

• Zippers: Besides YKK, high-end jackets often use Swiss Riri (excellent smoothness), Japanese Talon (retro feel), or American Scovill. The shape and material of the zipper teeth (brass, nickel silver, stainless steel) affect the overall texture.
• Buttons: Horn buttons, shell buttons, coconut buttons, and metal buttons each have their own applicable scenarios. For example, hunting jackets often use brass buttons, while bomber jacket men​ styles commonly feature snap buttons or four-button closures.
• Rivets and studs: Metal fittings on work jackets and motorcycle jackets must undergo salt spray testing to ensure they do not rust. They must be stamped into place during installation and must not be loose.
• Drawstrings and adjustment buckles: The ends of the hat cord and waist cord should be sealed with metal sleeves or heat shrink tubing to prevent the cord from coming undone.