This insulated backpack is part of BUILT’s smart Puffer range, which oozes streetwise style and is inspired by puffer jackets. It will keep food at a suitable temperature for longer. Its leak-proof polythene lining helps to keep food items cool for up to four hours. It’ll also keep warm foods hot. It has adjustable straps so should fit most adults. Made of ripstop, it’s very durable and resistant to wear and tear. It has plenty of room for things like snack pots and cutlery. Can be matched with BUILT’s 7.2L (12.5 pints, 243 fl oz) Puffer and Mindful lunch tote bags.