Using neoprene material Waterproof and keep warm 4h Starp design:easy to carry OEM/ODM design SGS/ ... Neoprene lunch bagUsing high quality neoprene material,Waterproof and keep warm more than 4 hoursNontoxic and safe to usePortable and reusableThickness:2mm~3mmLightweight ... outdoor activity,product promotion,gifts,etc. Kids Lunch Bag,fashion, Keep warm 4 hours