A lightweight, closed-cell foam flexibility folds over while offering superior temperature holding power. Food safe. Thermo Snap closure will keep the temperature of your food and drinks. Fold and go packing. Adjustable grid allows you to decide the size of your lunch bag by sliding the closing hook into one of the loops. Specs Unfolded: 5 3/4' x 13 1/2" x 8 3/4" Folded: 5 3/4" x 8 3/4" x 8 3/4" Empty weight: 1.1 lbs