4 oz /yd² (US) 6.7 oz /L yd (CA) 100% polyester with water resistant finish Trim 100% polyester oxford at top and back panels Black/Carbon has reflective print Laptop compartment fits most 17" laptops Black/Carbon has reflective print UTK Hydropel™ helps to keep contents dry in wet conditions Zippered main compartment with reflective toggle Inside zippered security pocket Large front and back pockets with hook and loop closure Mesh water bottle pocket on left side Wide webbing ergonomic tote handles that convert into backpack with stowable straps