2000 Piece Jigsaw – Crystal LakeTrefl Crystal Lake 2000pc Puzzle Trefl Jigsaw puzzles are made of high quality materials, using special calendered reflective paper, which facilitates laying. They are manufactured in Poland, and ecological materials were used for production. Trefl's main focus is to design and manufacture beautiful and superb quality jigsaw puzzles, board games and playing cards. Furthermore their beautiful, vibrant art work is nothing shy of museum quality.