3枚重ねの、など

three-ply, three ply
3-ply, 3 ply
triple-ply, triple ply
tri-ply
形容詞
※複合語の形容詞だから規範的にはハイフンでつなぐ必要があるが、実例ではハイフンはあったりなかったり、バラバラ。
※「1枚重ね」（重ねてないが）はone-ply[1-ply], 「2枚重ね」はtwo-ply[2-ply]……というように使う。

Halsey announced the news on Instagram, saying she was “in awe of the medical workers on the frontlines.” She says she worked with Orange International Inc. to source the FDA-certified three-ply masks from a factory in Guangzhou, China.
https://www.billboard.com/articles/columns/pop/935...

I have acquired and purchased 100,000 FDA certified 3 ply masks (with the help of Orange International Inc who sourced the masks for me from a factory in Guangzhou, China)
https://www.instagram.com/p/B-uoto7JQq3/
※上記Billboard.com報道のソース（Halseyのインスタグラムでの発言）。

The retail price of masks (three-ply surgical masks) shall not be more than the price that prevailed on the day one month prior to March 13, 2020, that is February 12, 2020 or not more than ₹10 per piece, whichever is lower; and the price of two-ply masks shall not be more than ₹8 per piece.
https://www.thehindu.com/news/national/karnataka/p...

I miss the days of buying a triple ply 12 pack.
https://mashable.com/article/10-things-we-all-drea...
※ソースURL記事内の写真キャプション（写真にカーソルを合わせると表示される）。「3枚重ね、12ロール入りのトイレットペーパー」のこと。

糸・紐・縄などで3本をより合わせているものもthree-plyと言う（「3本撚り」）。

鍋の「三層構造」もthree-plyで表す。

All the pieces are made from three-ply stainless steel with a thick-gauge aluminum core for better conduction and more even heat distribution, and they feature riveted stainless-steel handles. The pots and pans are warp-resistant, induction-compatible, dishwasher-safe and oven-safe up to 600 degrees (without their lids). https://www.cnet.com/news/best-cookware-set-of-202...