The grooves make proper grip seem logical. Innovative, 3 sided, ergonomic shape has a natural grip-zone, made from all-natural materials. Finish contains Microban antimicrobial protection, to inhibit the growth of odor and stain causing bacteria on pencil. Easy to sharpen in a regular pencil sharpener. High-quality, latex-free triangular eraser provides clean corrections. PMA Certified non-toxic.