This is my second sack pack of this exact design.  My first one lasted for about 3 years.  I used it for bicycling.  On some occasions I used it to carry my needed items to the car and starting point and during the summers it was used for parts of the rides to carry lunches and fluids.  It is very good for that because it has the two side pockets into which you can fit Gatorade or your favorite drinks with easy access. It also has the right number of pockets to put your keys, cell phone, tire repair kits etc.  The original one I purchased was black and "cloth".  That was a downside because it got hot in the summer.  The one I got now is "Spray Booth White".  It was significantly more expensive than the other color choices, but is quite reflective - more silver than white.  This not only adds to the safety factor when using it for bicycling, but should keep everything cooler too. Readers may find this review too focused towards bicycling, but the good attributes I have mentioned should extend to hiking also.  For other uses, it is still a good product, but maybe you don't need to spend double the money to get the white color.