Introducing Stroker XL, for the man who needs a little extra. By popular demand, Tantus created the Stroker XL featuring an additional 1/2" in length and girth. The Tantus Stroker is the first male masturbation sleeve of its kind. It is made of a super-soft, 100% ultra-premium silicone. The Tantus Stroker is designed to simulate contractions. The outside is non-representational while the inside has soft, stretchy ridges that give a rhythmic stimulus when moved.