Why Do Slippers Make My Feet Sweat?

It’s a common experience – you put on a cozy pair of slippers to keep your feet warm, only to find they make your feet uncomfortably sweaty after wearing them for a while. What causes this? There are a few reasons why slippers tend to make feet perspire more than regular shoes.


Many slippers are made of synthetic materials like acrylic or polyester fleece. While these materials feel soft, they don’t breathe well. The inside environment of the slipper becomes warm and humid from your body heat and sweat, but the moisture has no way to evaporate through the synthetic fabric. This causes sweat to accumulate, making your feet damp. Natural material slippers like wool or cotton tend to breathe better, reducing sweat buildup.


Slippers are designed to keep your feet warm and comfortable. Thicker, more insulated slippers do this by trapping heat inside. But this also means they trap in sweat, leaving no way for it to dissipate. The insulation creates a greenhouse effect for your feet. Thinner slippers with less insulation won’t retain as much heat and sweat.

Lack of Air Circulation

Unlike regular shoes, slippers are loose-fitting and allow little air circulation around the foot. Tight-fitting shoes keep feet drier because the constant motion of walking pumps fresh air in and out of the shoe with each step. The air exchange removes sweat vapor. But in stationary slippers, hot stale air and sweat fester around your stagnant feet. Without fresh air circulation, sweat has no place to go.


Slippers are worn indoors where the environment is warmer than outside temperatures. Our feet sweat more in hot indoor conditions versus cool outdoor conditions because sweat helps regulate body temperature. When the thermometer creeps up, your sweat glands work overtime trying to cool you down – including the ones in your feet. Warmer conditions equal sweatier feet, slippers or no slippers.

Bacteria and Odor

Once sweat accumulates in your slippers, the moist environment allows odor-causing bacteria to thrive. The bacteria feed on the sweat and produce smelly metabolic waste products. This leads to the notorious stinky slipper smell. Removing your feet from the slippers to air them out regularly can help decrease bacterial buildup and foot odor inside.

While slippers are beloved for their comfort, their heat-trapping nature makes feet sweat excessively. Choosing natural material slippers over synthetic ones can help. Also, try wearing them with socks to absorb sweat. And remember to let your slippers air out often to discourage bacteria growth. With a little sweat mitigation, you can still enjoy cozy slippers without the soggy feet.