zebra mildliner soft color double-sided highlighter pens 20 color set(standard 15 color + new sunny 5 color) with original vinyl pen case zebra this “mildliner” give you pleasure and comfortable while writing book or note, anything else.this “mildliner” have something special soft and cool color. this “mildliner” is multipurpose. especially, i suggest this “mildliner” to student and illustrator, some expert for writing or marking, drawing. each one has two different thickness ballpoint.