Last week we talked about the different styles of backpacks and features available from which to choose from. (If you haven’t read Part One, start here). In the second part of this series, we will talk about sizing and fitting a backpack, as a good fit will do wonders for your comfort.
Sizing
Before you start looking at actual models and styles of packs, it’s best to get a measure for what size you will be, as some brands may not carry all lengths.
To measure your torso, use a flexible sewing tape or a length of yarn or cord. (Note: it is easiest if you have someone helping you). Standing straight, start at the base of you neck along your back (the C7 vertebra). Then, running your hands down the sides of your torso, find the top of your hipbones. Draw an imaginary line between your thumbs, and measure where your spine intersects this line. That measurement is your torso length.
Because we should be carrying most of our pack weight on our hips, it also helps to measure our hips. To do this, measure around your torso one inch below the top of your hipbones. This measurement is less important than your torso length because most packs have adjustable waistbands, but it is always useful to have on hand.
While sizing varies between brands and models, here is an approximate breakdown:
Extra Small: Fits torsos up to 15″
Small: Fits torsos 15″ to 17″
Medium/Regular: Fits torsos 17″ to 20″
Large/Tall: Fits torsos 20″ and up
It’s always best to refer to the brand and model specific sizing information, as they will vary, but the above breakdown is to give you a frame of reference.
If you are a woman looking for a pack, it’s also good to keep in mind that many manufacturers have created packs designed specifically for women. At first glance they may not seem any different from the other packs other than the color of the fabrics, there are a few small details that can make a big difference. The frame of the pack is designed for a narrower torso, shoulder straps are closer to each other, and the hip belt is placed at an angle to accommodate a woman’s hips. These features may not be as much of an issue if you are taller or have broad shoulders, but for a petite hiker (like myself), they make a huge difference with comfort.
Adjusting the Pack
So, you have determined what type of pack you want, and what size torso you have. You maybe have even narrowed it down to a few models. At this point, it’s probably a good idea to head over to your favorite outdoor retailer to check out their selection. This is a good opportunity to get a feel for the features of the pack and choose between a few different models. Another great advantage is that many stores have a bin filled with various weighted sacks to stuff into a pack before you try it on. (At our local REI, they even have a few object-specific sacks for items like sleeping bags or down jackets).
If you can, try to fill the pack with at least 15-20 pounds of weight and spread it out as evenly as possible to fill the pack. This will give you the most realistic idea of how the pack will perform on the trail.
Before you put on the pack, loosen up all the main straps: hip belt, shoulder, sternum, and all load adjusters. Then, put the pack on and fasten the hip belt first. Adjust the hip belt so that it sits securely but comfortably on your hips. Next, tighten the shoulder straps, but not to the point where your shoulders are carrying most of the weight of the pack. Remember, your hips should be carrying most of the weight of your pack. The sternum strap is designed to bring the shoulder straps in along your torso, but it should not create pressure on the chest. Adjust the sternum strap as needed and take a few deep breaths to make sure it isn’t too tight across the chest. Finally, have someone assist you in adjusting the load adjuster straps. These will fine-tune the fit of your pack, and may need to be adjusted depending on how much you are carrying and for how long.
Finding the backpack that is best for you can be a time-consuming process, but if you spend the time to find the pack that fits you properly, you will be rewarded every time you hit the trail. Check back soon—in the final installment of this article, we will talk about maintaining your pack.
