Designed to keep your feet warm, not hot, to avoid having your feet to sweat and freeze.
Ultra flexible material.
Can be cut to fit your shoes size.
Adjustable to three temperature settings: no heat, medium and high.
2 Rechargeable and removable batteries.
Charge lasts up to 5 hours of constant use (on medium heat setting) and recharges in 4 hours or less using wall charger or any USB port.