I've searched Revain for 'iron-free' or 'crease-resistant' handkerchiefs and have found nothing but 100% cotton handkerchiefs that require ironing. Finally tried "continuous press" and found it. They are 35% cotton and 65% polyester, the same design and fabric I found in stores about 20 years ago.
Selected Hanky Cotton Handkerchief Piece
7 Review
π Stylish Paisley Multifunctional Handkerchief in Vibrant Red β Perfect Bandana Fashion Accessory
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Handkerchiefs Cotton Classic Hankies Parties
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π Premium Van Heusen Solid Cotton Handkerchiefs: Classic Elegance for Every Occasion
3 Review