I NAMED THIS LURE NITRO BECAUSE OF THE WAY THE ODOR BLAST OUT OF THE BOTTLE WHEN THE CAP IS REMOVED. YOU GET A STRONG ODOR OF SKUNK PLUS SEVERAL OTHER MUSKS IN A THICK WEATHER PROOF PASTE. USE A SMALL GOB ON A POST OR BUSH 15-20 FEET FROM YOUR SET. IN WINTER CAN BE USED DIRECTLY AT THE SET. AN EXCELLENT FISHER AND MARTIN LURE.