Pow is a premium manual strokerandnbsp;andnbsp; Suction Control Pow`s intuitive silicone sleeve and air pressure release valve work together to harness natural suction. By placing a finger over the air pressure release valve during use, you can control the suction intensity exactly to your liking, creating a customizable, totally natural feeling. CleanTechandnbsp;Silicone Pow`s inner sleeve is ribbed and textured for more stimulation, while being silky-soft and kind on skin. Made without BPA or phthalates, this durable, hypoallergenic silicone is the finest quality, ultra-hygienic material for long-term, intimate use. Quick Clean Helix Smart structure within Pow`s inner sleeve optimizes cleaning and dryingandnbsp;speed without compromising on those smooth sensations.