High quality waterproof oxford fabric with aluminum foil material with sturdy and smooth dual zipper. Insulation linning with foam preserve foods, meal, fruit, vegetable, drink and pills for a long time. Max length for shoulder strap is 26 4/5" and minimum size is 15" with special circle for the strap. Perfect partner for going to work, company picnic, back to school camping. 9 2/5" L x 9 2/5"W x 5 1/2" H