Safe Flame Retardant MaterialThe shoe dryer is made of flame retardant material. The surface temperature if maintained between 50 and 60 , the core temperature can reach 150 , it is resistant to pressure and high temperatures, and it is not easy to burn or deform during use. 60 All-round Heat Dissipation There are many vents densely distributed on the surface of the dryer. When heating, a hot air circulation flow is formed in the inner space of the shoe, which ensures a 360 uniform heat distribution and accelerates water evaporation. It can also take care of both the soles and the upper, drying evenly including the dead spots. Temperature ControlThe dryer can be set to different times of 4/8/12 hours, This precise time control can protect your shoes from overheating. Easy to CarryThe portable shoe dryer is the size of a palm and fits easily into a suitcase or purse, perfect for travel or home use. This winter/rainy day, you'll never have to worry about drying your shoes again.