Is there a good kind of invader? Cuz we think we found it. The Oxballs Invader is the penis sheath for you if you're looking for added girth and length, but also premium stimulation for both you and your partner(s). This open-ended sheath has ribbing on the outside and texture on the inside, so everyone gets a helping of high-quality sensation as you play. The silicone and TPR blend is smooth, stretchy, strong and warm, so you can play with abandon and enjoyment. Oxballs designed this sheath to stay put no matter how long you play, adding confidence to the list of benefits of this toy. Use with all styles of lube except oil-based for less friction and more fun.