There are many ways to produce garments, and most garments today you’ll see seams running from the armholes down to the hem where the front and back sides were stitched together. However, traditional sweatshirts made by labor intensive method don’t have those seams, or any seams at all. The fabric is created as one whole tube in a process known as “loopwheeling”.
Loopwheeling is done on machines that knit in a circle, piling layer upon layer of cotton into a giant cylinder. That cylinder becomes the body of the sweatshirt so manufacturers need different machines to produce fabric for each size of sweat.
The machines are also very slow. Averagely most of them can only operate 24 rotations per minute, which is slower than a record player. You can even count them and adds up
to around one meter of fabric per hour. Machines place no tension on the cotton yarns as they knit to create a softer and denser fabric than pretty much anything else around.
Maison Mathematiques’ sweatshirts made in Japan have been woven a bit tighter than tradition loopwheeled sweaters to make them a bit more windproof.
Yes, sweatshirts are the ultimate comfortable clothing.

ループウィラー 生産方式は大きなシリンダ樽の中に綿糸を重ね起きをして一つの丸体で服を製作する機械をいいます。このシリンダがスウェットシャツの本体になり、それぞれにあるスウェット製作のために直物も別に必要となります。
ループウィラー機械は他の生産機械に比べて生産速度がとても遅いです。1分に24回程度の回転しかできないので、大量生産とは合わない方式です。メゾン・マテマティクのスウェットは高い内構成と楽な着用感のためにループウィラー 方式だけでスウェットを製作します。

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