15 mil thick

while the waterproof bootie construction means puddles are no problem

420 HC stainless steel construction

and the “X” tacks measure 1″ x 1″

flow rates

UA Hustle 6.0 Backpack COLORS:CARDNIAL 15 mil thickUA Hustle 6. 0 Backpack This backpack does it all. It's water repellent for the rain, tough as nails, comfortable as anything, and has all the pockets you need to hold all your stuff. PRODUCT FEATURES *Water resistant UA Storm technology keeps your essentials dry. *Soft to the touch top coat on material for added durability. *Soft lined laptop sleeveholds up to 16" MacBook Pro or similarly sized laptop. *Secondary compartment can be dual purposed as a