The Buku Hydrophobic Dacron is a bulk spool of dacron that's great for a range of game fishing applications such as making wind-on leaders, or rigging live baits with small amounts of 50lb. The Buku Dacron is treated with a hydrophobic substance that minimises water/liquid absorption, and also maintains grip and strength even at high temperatures, whereas traditionally waxed dacron will lose its coating at higher temps.