Exactly as advertised, this is a very heavy duty very large duffle bag.  I use it to store and transport the broken down components of a sheetrock lift, which together weigh 240 lbs and include pieces that are 48 inches long.  That's some heavy abuse and it's standing up admirably.  I also like that there are tons of handles on the thing.  You can haul it by one end, throw it over your shoulder, or pick it up at the center.  I'm going to order a couple more of these in smaller sizes for other gear.