• Includes 1 pair of heated thermal insoles, size 39-40 • Made with high-quality elastic EVA foam, PU, and a soft surface, providing comfort and relaxation for your feet • Self-heating without the need for recharging, distributing heat evenly throughout the insole • Keeps feet warm for long periods, exceeding traditional insoles by more than 10 °C • Soft, breathable memory foam material, absorbs sweat, relieves pressure, and absorbs shocks • Durable, does not deform easily, and can be used for a long time • Suitable for all types of footwear: sports, business, casual, hiking boots, leather shoes, high heels, etc. • Perfect for outdoor winter activities such as walking, running, skiing, climbing, or camping • Caution: Not recommended for people with sensitive feet or injuries; avoid excessive use to prevent overheating