Preheat oven to 175°C (350°F). Line a baking tray with parchment paper and roast 260 g of raw hazelnuts for 25 minutes. Insert hazelnuts into kitchen towel. Gather all four towel corners and grab just above the hazelnuts, crafting a ball. Keep it for few minutes to have steam help loosen the roasted skins. Keeping the same grip, rub the ball in fast circular motion against other hand. Make sure you wear oven gloves, it is very hot!