The newly updated Southwest, like the Windrider and Junction, represents Hyperlite's vision of a versatile, adaptable, and capable tool for nearly any adventure. Since its introduction over fifteen years ago, countless backpackers have seen and done it all with theirs. The Southwest’s main pack body is built with a new, fully woven Dyneema® 200-denier fabric that offers more durability than ever before with the same signature lightweight and 100% waterproof qualities that have made Dyneema our primary material choice from the beginning. With solid-fabric exterior pockets that offer added protection for whatever’s inside in abrasive, rocky terrain, the Southwest is a comfortable pack that delivers premium performance wherever you’re headed. This 55L pack is designed for on-trail, off-trail, and all-season environments, with solid-fabric exterior pockets to eliminate snag risk, protect stowed gear, and provide privacy when resupplying in towns. This workhorse is designed for almost any backcountry activity, from on-trail hiking to the most demanding off-trail and all-season environments. Designed For: All-purpose backpacking Great Weight For: Any on-trail or off-trail backcountry activity Weight: 30.8oz | 874g (Med/White), 30.9oz | 876.3g (Med/Black) Identical to Windrider/Junction but with solid-fabric exterior pockets Two over the pocket compression straps for load security D-shaped flat bottom keeps pack upright while loading/unloading Roll-top closure with internal mesh sleeve & hydroport White pack is 50-denier DCH fabric, Black pack is 200-denier Load capacity: Up to 40 lbs Internal Volume: 55L External Volume: 13.4L Top Circumference: 40" | 101.6cm Height (fully unrolled): 36" | 91.4cm Back Width: 11" | 27.9 cm Made in Mexico How to Choose a Pack Size: Your torso length, not your height, determines your pack size. We recommend the following to determine yours: Tilt your head slightly forward to locate the bony bump at the base of your neck. (This is your 7th cervical (or C7) vertebra). Using a flexible tape measure, have someone measure starting at that spot and running down along the curve of your spine. Place your hands on your hips so you can feel your iliac crest, which serves as the "shelf" of your pelvic girdle. (It's the first hard thing you feel when you run your fingers down from the sides of your ribcage.) Position your hands so your thumbs are reaching behind you. Have your friend finish measuring at the point where the tape crosses an imaginary line drawn between your thumbs. This distance is your torso length. Small (15.0" - 17.0" torso) Medium (17.0" - 19.0" torso) Large (19.0" - 21.0" torso) Tall (21.0"+ torso) If your measurement falls right in between sizes (for example, if you have a 17.0" torso, so you are right on the line between a Small and a Medium), we suggest you choose the larger torso size.