Northern Special Halo is an intensely attractive yellow "trigger smoke" containing a high level of our powerful NS1 aroma blend. Just a coating of this superb liquid will increase the attraction of your bait and ensure it releases an irresistible and vivid yellow "halo" of appetite-stimulating attractors in the water. It is extremely effective at all water temperatures and is also compatible with PVA. Maximum use 10 ml per 50 g bait/hooks.