Waterproof Oxford Cloth USB Heated Lunch Box Insulation Bag

This is a lunch bag designed for use with USB heated lunch boxes. It provides heat preservation for food items.

• Material: waterproof Oxford cloth
• Weight: 200 grams
• Size: 21x16x8 cm
• Heat preservation function: automatically switches to heat preservation state when heated to about 50 degrees
• Portable, large-capacity main bag
• USB socket for convenient heating
• Durable zipper for smooth opening and closing