These brand spankin back packs r strong, but light weight. Carry yr medium, big and biggerest lap toppers in these. . .and you'll joust about run out of stuff to stuff in all the flaps and zips inside n outside . . .The Sheep Scarer, Base Toucher and Team Player have original 1000d Chicken Tex" hyper performance accessory fabric and waterproof ripstop lining. There's a removable extra padded laptopsleeve with additional zippocket and penholder and the dr bodenschatz back hugger makes light work of heavy loads. There are external side loops for attaching pouches and cases, plus super strong shoulderstraps with a chest strap for fine adjustment and loops for pouches. There are two easy access front zip pockets and one internal mesh zip pocket plus internal pockets with velcro closures.