Coach Pace Large Backpack In Signature Jacquard Brixton Baker Herschel Supply Co Herschel heritage 24l backpack in black ASOS Jansport Copper Brown Backpack Brown Canyon Orange Jansport Copper Brown Backpack JanSport BACK Keeping backpacks below 20% of your body weight is the general rule, but honestly I'd rather hit the gym and gain 5 10 lbs of muscle weight so I can bring a good Backpack Adidas Dv0201 Adidas Originals 3D Backpack Bag (Bao Bao) White DV0201