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If those prices scare you then you should take a trip to your local Uniqlo soon, as they currently have quick drying mesh shirts for Y1,000. I picked up a couple while in Kichijoji last weekend to try out on my daily commute and discovered them to be cool, comfortable, and fast drying. In addition to this they come in a variety of fashionable and/or eye searing colours for on road visibility and feature a limited number of designs.
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Obviously they lack pockets in the back, and a zipper in the front for when it really gets hot but as a cheap alternative to a cycling jersey these tops are well worth the Y1,000 investment.
You can view, and purchase, these shirts on the Uniqlo website. Just be sure you're looking a the dry mesh (ドライメッシュ) types.