The outer layer of the lunch bag is made of waterproof Oxford cloth, which is durable and waterproof. The inner layer of the lunch box is made of PEVA material, which has excellent heat resistance. Keep food cold/hot/fresh for several hours. We use the highest quality zipper processing, which is easy and smooth without jamming, minimizing the possibility of zipper breakage. The design of lunch bag (23*20*12cm) maximizes storage efficiency. It has a thoughtful side pocket that can hold a knife, fork or mobile phone. The high-density smooth lining is anti-fouling, and the stains can be easily removed by wiping with a damp cloth or paper towel without damage.