Defense Technology/Federal Laboratories offers its latest technology in aerosol defense sprays -- First Defense 360o. Utilizing compressed air with barrier separation from the liquid formulation, First Defense 360o is capable of delivering a stream pattern at any angle and any orientation. The MK-3 with 1.3 ounces of formulation allows for six bursts, while the MK-4 with 3 ounces of forumation delivers 11 bursts. No additional training or education is required to use this new product with improved performance.