An icon that would be the future of icon design is responsive line icons. These creative icons pack resembles animated GIF or other complex images. Most of the icons present in this set are recognizable. These primarily use where the designer wants to educate the average user without special instructions.
The link has 3 style variations to play in your design project, but each design contains various details. Produce a consistent and clean look due to the fixed line weight that is 2px. Size is not a limiting factor because the file contains the SVG and PNG formats.