ValueRays USB Heated Slippers -"TWO SIZES" - Warming Slippers, (SMALL) BUY ONE - GET SECOND PAIR OF SLIPPERS SAME SIZE 50% OFF! SPECIAL OFFER - For Size Large, enter code 50LRGSLIP and for Size Small, enter code 50SMSLIPP at checkout. Approx Sole Measurements. SMALL: 10.75" L x 4.25" W -- LARGE: 12.75" L x 5.25" W USB 5V Carbon Fiber Heating Element enclosed in flame retardant fabric. Infrared Heat. Plugs into a USB port for heat. Gets warm, not hot. Full Slipper Shoe Non-Slip Sole. Improved Heating element covered with flame retardant fabric is on the sole of the shoe. CE & RoHS Certified. Requires 2 USB Ports or USB Adapters. Two USB connections provide more power to the slipper for maximum heat. Great for sitting at the computer or watching TV using a USB adapter on a power strip. Easy Disconnect Switch on 65" USB Cords. Two USB cords provide stronger energy to create heat and make for easier to movement. USB 5V Carbon Fiber Heating Element. Infrared Heat. Plugs into a USB port for heat. Gets warm, not hot. Full  Slipper Shoe Non-Slip Sole. Improved Heating element covered with flame  retardant fabric is on the sole of the shoe. CE &amp; RoHS Certified. Requires  2 USB Ports or USB Adapters. Two cords are better than one for movement and autonomy. A stronger USB connection provides better heat. Great for sitting at the computer or watching TV using a USB adapter on a power strip. Easy Disconnect Switch on 65&#034; USB Cords. Two USB cords provide stronger energy to create heat and make for easier movement. USB 5V Carbon Fiber Heating Element. Infrared Heat. Plugs into a USB port for heat. Gets  warm, not hot.  Full Slipper Shoe Non-Slip Sole. Improved Heating  element covered with flame retardant fabric is on the sole of the shoe.  CE &amp; RoHS Certified. To produce more heat towards the front of the toe area, carefully trim the fabric and slide the heating element insole closer to the front of the shoe.