Features:<br /><br />-100% brand new and high quality!-Battery compartment designed line PCB， contained three ICs， for power， intelligent battery recycling and independent line control IC battery safety.-These insoles contain 2 straps that can be tied at the feet of the Achilles tendon， and the battery box can be placed on the outside of the wearer's bag， easy to carry.<br /><br />-Insoles with battery pack included in mesh fabric bag that securely attached around the leg with strap-Easy to cut<br /><br />Specification:<br /><br />Suitable for shoe size 36-46<br /><br /><br />Material:EVA<br /><br /><br />Requires 3 x AA batteries (not included)<br /><br /><br />Cut-to-Fit Size:Chinese Size - Length - US Size36 - 22.4 cm - 6.5 "38 - 23.7 cm - 7.5 "40 - 25 cm - 8 "42 - 26 cm - 8.5 "44 - 27 cm - 10 "46 - 28cm - 12 "<br /><br /><br />Color:Black<br /><br /><br />Season:Winter<br /><br /><br />Quantity:1pair<br /><br />Package Included:<br /><br />1pair x Heating inserts2 x Battery box (do not include battery)2 x Straps          <br /><br /><br /><br />Note:<br /><br />The<br /> size is just for reference， there maybe exist a measurement error of <br />1-2cm， please check whether it fits your size before you buy it.<br /><br /><br />Color may vary slightly due to different calibration of each monitor.<br /><br /><br /><br /><br /><br />