DriSoles are cushioned barefoot insoles made of fast-drying polyester that doesn't absorb sweat and doesn't stick to sweaty skin. These are NOT cut to size, so please choose your proper size. Unlike other sockless insoles, DriSoles are cushioned, so you can wear them both in running shoes and business shoes. Your feet won't become as fatigued as with the hard-type sockless insoles currently on the market. But the insoles are still thin, so they don't take a lot of space in your shoes. The bottom of DriSoles has 2 layers of viscoelastic latex designed to absorb shock. DriSoles are made of 100% polyester fiber, so they are soft, but they don't stick to sweaty feet. And the latex backing insulates the sole from the hot ground and ensures that the reverse side will not slide around in your shoe. DriSoles are inherently odor-stopping due to the hydrophobic nature of the polyester fibers in the interior layer. This inner layer has also been coated in a powerful odor-suppressing material that naturalizes foot sweat. Care Instructions: It is recommended to NOT wash the insoles for at least 3 months to allow the scent-neutralizing agent to work at its full effectiveness. They can be machine washed at a maximum temperature of 30° C, although it is better to do it by hand. Please remove the insoles from the shoes every night to allow them to breathe. This will extend their lifespan.