Couple questions

I was looking at a review for the Black Diamond Quantum pack, and had a couple questions that should be real easy for all you experienced folk to answer.

Looking at this site, http://www.sierradescents.com/reviews/packs/black-diamond/quantum.html , where the review was found, I was wondering what the "bivy pad" was (it's in the section talking about how the pack strips down). Is it for bivy sacks or what?

Secondly, I'm interested in this pack, and would be using it for week long treks. I want to buy some really light gear. Is a 55 L pack large enough for this?

Thanks

It's for bouldering / climbing.

Welcome Jmerk!

CWF is right this is a Mountaineering backpack I do not think it would be suitable for your needs of extended trekking, I have a few choices here that you might want to consider for a pack these will be able to hold all your gear and not kill you (break your back) in the process of your hike. I hope this info helps you if you have more questions please post them we will try and help as best as we can .

R_Ranger

http://www.trailspace.com/gear/osprey/argon-85/
http://www.trailspace.com/gear/kelty/slider-65/
http://www.trailspace.com/gear/the-north-face/crestone-75/

The bivy pad serves several functions. First is that it is the stiffening frame structure, where some packs use a rigid plastic sheet or aluminum rods. Second is the function of pulling it out for a seat when belaying or stopping for lunch, or even as an insulated seat when bivouacing (hence the name, bivy pad). Third function is that it can serve as a splint for broken bones, sprained ankles, and the like. This is something that guides like to have, a multipurpose part of anything you carry.

Yeah mate, this pack's a technical lightweight climbing pack that strips down for ultralight climbing/mountaineering assaults.
Pack size varies greatly depending on trip duration, location, temperatures, activities, comfort levels, party size, etc, so you'll need to think about your general needs then get the gear, then you'll know the size pack you'll need.
A well researched, properly fitted backpack will be enjoyed for years but a poor choice will be cursed in hours. Like a lot of gear, what is ideal for one persons needs may be totally inappropriate for another. Although I did see the Osprey Argon mentioned above in a 70lt on sale which may be worth a look.
Good luck, hope you find what you're after.

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