How to Select a Good Rack Sack
The truth is that when planning to buy a rack sack there are two major issues to look into which include the back capacity because the size of the pack that the person needs depends on the length of the trip and how much weight the person intends to carry and the features of the bag which are the refinements that affect how the back pack works for them. In regard to capacity for a person that wants to travel for a weekend or for one to three nights a rack sack having a capacity of 30-50 liters is good and efficient parkers usually use newer and less bulky gear which can really keep things light on the trips by using such a bag. Packing this kind of bag requires careful planning and self-discipline, but if the parker manages to pull it off then the impact of the lightweight on the feet can be amazing. The other kind of bags are the multi day backpacks which are the most popular and they are suitable for warm weather trips that last for 3-5 nights or more and 50-80 liters packs area also used for backcountry skiing, overnighters, for day trips and for two-night trips. The last type of backpacks are the extended trip (5+nights) which carry 70 liters or more and they are preferred for situations like winter treks which last for more than one night and the larger packs can even comfortably accommodate extra clothing, a four season tent with extra poles and a warmer sleeping bag.
In regard to backpack features there are certain things to look at such as the back frame types which range from internal-frame backpacks, external frame backpacks and frameless backpacks. The internal frame backpacks are the most commonly sold backpacks and they are body hugging and they are designed to keep a hiker stable on even terrain and they may include a variety of load-support technologies that all function to transfer the load to the hips. External backpacks may be a suitable choice if the person is carrying a heavy, irregular load like an inflatable kayak to the lake and they also offer some good ventilation and lots of options to organize for gear whereas frameless backpacks are suitable for ultralight devotees that like to hike fast and light and some of them have removable frames for weight savings.
A fact worth stating is that ventilation is also another feature of backpacks and some backpacks have a suspended mesh back panel that is used to combat a sweaty back syndrome and they come with internal frame packs that ride on the back.