There is something satisfying about seeing real, visible results. Not imagined ones. Not hoped-for ones. The kind you can measure. The Max Boost gives you that, session after session, with a straightforward routine that fits into your schedule and asks very little in return.The piston-action design is built directly into the pump head, so there are no hoses to connect, no batteries to charge, and no motor loud enough to kill the mood. You press down, release, and feel the suction build. The crystal-clear polycarbonate tube lets you watch the expansion happen in real time, and the ruler built into the tube tracks your progress with zero guesswork. The removable silicone sleeve sits soft against your skin and keeps the seal comfortable throughout. Because there is no motor involved, you can use it in the bath or shower without a second thought. Fill the tube with warm water first and the sensation changes entirely. The quick-release button lets you drop the pressure instantly when you are ready.If you are going to make this part of your routine, you want something built to last and simple enough that you will actually use it consistently. This is that tool. The decision is straightforward.Overall Length: 11.25 inches (28.6 cm)Overall Width: 3.25 inches (8.3 cm)Insertable Depth: 7.5 inches (19.1 cm)Sleeve Opening: 1.2 inches (3 cm)Material: ABS plastic, polycarbonate, siliconePower: Manual piston-action, no batteries or charging requiredWaterproof: YesWhat's Included: Pump with built-in piston, elite silicone pleasure sleeve