Before there were bobber-type indicators (ie. Air-Lock and Thingamabobber) yarn was the best option - it still is a great choice. This type of indicator offers great visibility and an extreme sensitivity to movement and subtle strikes. Landing on the water with little or on splash, yarn indicators still are the most subtle and sensitive indicator option on the market. Treat the yarn with a liquid floatant before use and throughout the day as needed (Aquel works well).