Material : EVA
Material : EVA, carbon fiber, polyester
heating material : : carbon fiber heating element.
size : : S(36~38), M(39~41), L(42~44)
batteries : : rechargeable,AA batteries
time of keep warm : : H -3 hours, M-5hours, L- 7hours.
li battery : 3.7V/1400MAH
product size : 29.5X9.5x1cm ( L)
certification : : CE, ROHS
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