Oxballs invented the modern cocksheath by morphing our original cocksling to a sheath creating the first sheath that really stay on no matter how hard you play.INVADER is that good and moreour first open-ended sheath with wavy ripples on the shaft, and texture inside, So everyone gets max stimulation.Made of PLUS+SILICONE, our slick soft silicone and stretchy TPR blend.>