Fleshlight Sleeve Warmer. Time to turn the heat up! The Fleshlight Sleeve Warmer is here to enhance your masturbation experience with a dizzying new level of realism. This newest Fleshlight accessory is designed to warm your SuperSkin sleeve to a comfortable bodily temperature making it better than ever. So open a window, because things are starting to heat up. How it works: the Fleshlight Sleeve Warmer is compatible with all Fleshlight products including the more compact Flight model. In less than five minutes your sleeve will reach 105 degrees Fahrenheit and will maintain the temperature so it's ready to go when you are.