Polarbox has created these unique cooler bags which have quickly become a popular summer must-have. The cooler bag, which is a mix between both modern and vintage - keeps the drinks cold with the help of polystyrene, which both works well as insulation that keeps the cold in, all the while it is an incredibly light material, so the bag does not weigh too much. The strap is made of leather and can be adjusted in three different lengths. Køleboks unisex Lifestyle, Outdoorlife.