Ever thought of what ACG means? All Conditions Gear is the correct answer, and this gear really is ready for all conditions. The first Nike ACG pieces were first available for purchase in 1989. ACG has built its image in the industry through an unobtrusive presentation because Nike believed that ACG's actions will speak for themselves. In its history, thousands of people all over the world have fallen in love with the ACG brand, their indestructible sneakers, apparel, and accessories.