This Biggy is an organizational insert that will work perfectly with your Tilly Tote. The Biggy is made of a lightweight nylon and features tons of well thought out pockets. The exterior features open pockets and a zipper closure. Inside we've placed 4 clear pockets and 2 side nylon pockets (perfect for glasses or a small water bottle). Features: Italian Vegetable tanned leather accents with gold hardware Top zip closure Exterior slip pockets interior zip, clear, and nylon slip pockets Flat base for stability Product Care Spot clean