This insole contains tourmaline and it can heated spontaneous ,and its main effect is to message the feet and keep warm it may not reach to a high temperature, because it makes people feel uncomfortable Benefits keep warm and keep healthy long-term effect and durable wear comfortable and beautiful, does not affect work study and life; without using any energy, reliable, and eco-friendly that is markedly heat-based products, no external power and heat. Material: Cotton,Tourmaline powder balls,Far infrared rays balls Color: as shown Size: 27cm Package Include:1 Pair Shoes Insole Note The color is just for reference only. It may slightly different from real item. Please allow the size for 1-3cm difference due to manual messurement. Thank you! Shipment 1. WORLDWIDE SHIPPING. (Except some countries and APO/FPO) 2. Orders processed timely after the payment verification. 3. We only ship to confirmed order addresses. Your order address MUST MATCH your Shipping address. 4. The images shown are not the actual item and are for your reference only. 5. SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transit time may vary, particularly during the holiday season. 6. If you have not received your orderafter 30 days from payment, please contact us. We will trace your order and get back to you asap. Our goal is customer satisfaction! 7. Delivery Time: Return & Refund 1. You have 7 days to contact us and 30 days to return it from the date received. If the item is in your possession more than 7 days, it will be considered used and WE WILL NOT ISSUEA REFUND OR REPLACEMENT to you. There are NO EXCEPTIONS! Shipping cost is bear by both seller and buyer in half. 2. All returned items MUST BE in the original packaging and you MUST PROVIDE us with the shipping tracking number, specific reason for the return, and your order ID. 3. We will refund YOUR FULL WINNING BID AMOUNT, upon receipt of the item in its original condition and packaging with all components and accessories included, AFTER BOTH Buyer and Seller cancel the transaction from . OR, you may choose to have a replacement. 4. We will bear all the shipping cost if the product(s) is (are) not as advertised. Guarantee 1. 12 months Manufacturer's limited Warranty for defective items (excluding items damaged and/or misused after receipt). Accessories come with a 3-month warranty. 2. Defective items MUST BE reported and returned within the warranty period (and in the original packaging, if possible). You must tell us what the defect is and give us your order number. WE DO NOT REPAIR OR REPLACE ITEMS WITH AN