Sensa writing instruments are constructed with quality materials and craftsmanship. Sensa pens are famous for their potential Plasmium gel grip that conforms to the unique shape and placement of your fingers for ultimate comfort. The material used for the external layer of the grip responds to your touch to prevent slipping and keeps your fingers in a relaxed position. The Plasmium gel inside flows to respond to your finger's unique shape and the way you place them on the pen. The result is an amazingly comfortable writing experience.