Armour Up is a slimmer and thinner version of the best-selling Cock Armour for bigger bulges, enhanced erections, and more intense orgasms. It is designed with a revolutionary anatomical shape that hugs your torso and pushes your gear out entirely from your body to enhance your penis and scrotum.Armour Up is made of a proprietary blend of silicone and TPR developed to provide superior stretch, comfort and durability. Diameter of opening is 1.5 in. It is safe with water-based lubes. Wash thoroughly with mild soap and water. Not compatible with latex products.