I'm having a bit of a trauma uploading pics etc. at the moment, so please email for pictures. However, it is the same as the pack shown below, but the grey sections are red (image nicked from this review:
http://www.bikeradar.com/gear/category/accessories/luggage/backpack/cycling-backpacks/product/review-wingnut-mps-alpha-backpack-33776/)
For those not familiar with Wingnut rucsacs, the premise is very simple, the sac is designed to sit very low on your back, almost like a massive bumbag. This means you can carry heavier loads with less discomfort, less clashes with the helmet and keeping a (slightly) lower centre of gravity.
This particular model is basically three or four rucsacs in one. Best to look at the Wingnut website to get a better idea of how it goes together: http://wingnutgear.com/product_details.cfm?product_id=162
I have succesfully used this for camping trips (with a tent, not a bivvy bag) ranging from 1 night to 15 nights, although the maximum amount of food I could carry was equivalent to about 6 nights.
This thread here and this ones previous to it (see the link at the top of the post) show the bag in use, although I was pushing the limits of what was really possible with it on that trip.
Please post/email if you have any questions. I'm selling because I don't foresee myself doing any more MTB trips with the tent and the camping gear, at least not in the foreseeable future, so think its time to let someone else have a go! The bag is in good condition barring a small tear in the main mesh pocket, and another smaller one in one of the side pockets. Unless you're planning to keep your loose change in them I wouldn't worry about the tears. Overall I've got about 5 weeks total use out of the bag.
The bag retailed at £145, so I'd be looking for £75 posted.
