Strokers, also known as sleeves, are male sex toys designed for solo play. They are tube-shaped and made of various materials such as silicone, TPE, or cyberskin, to simulate the sensation of penetration. The user inserts his penis into the toy and moves it up and down to experience pleasurable stimulation. Some strokers are designed to resemble specific body parts, such as a mouth, vagina, or anus, and may include textures or ridges for added stimulation. They can be used with or without lube, and often come in different sizes and designs to suit individual preferences.