backpacks fit a large man with big shoulders?

well I don't know what you mean by big, I'm 6'2 320lbs wear a size 56L in a suite and it's comfortable to me

The dark static model have the red interior padding for electronic to?

Yes... the difference is only the color on the exterior

Is the bottom made of more durable material or rubber for wet surfaces it may be set on?

Mine has been sprayed by a fire hose and little moisture inside. The whole thing is made out of same very durable material gone through TSA and drug on concrete and still looks new and no damage to things inside.

Outer Material	Ethylene Vinyl Acetate
Material Type	Polyester
Shell Type	Soft Shell
Lining Description	Nylon
Product Care Instructions	Hand Wash Only
Item Weight	1.6 Kilograms
Item Dimensions D x W x H	10.5"D x 14"W x 19.5"H
Storage Volume	1800 Cubic Inches
Unit Count	3.35 Pounds
Item Shape	Rectangular
Color	Black
Pattern	Backpack
character	RSS
Backpack Design	Laptop Backpack
Style Name	Renegade
Number Of Pockets	23
Apparel Closure Type	Zipper
Water Resistance Level	Water Resistant
Pocket Description	Utility Pocket
Compatible Device Size Maximum	15.5 Inches
Strap Type	Shoulder Strap
Embellishment Feature	Cord

Renegade Backpack

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