In looking to lighten my pack loads, I recently bought a Black Wolf B-lite 55 pack. I had been looking at something like the GoLite Jam but baulked at the price tag. When I saw the 800g Black Wolf pack on ebay (or direct through Wild Earth) for $79.95 (+ $15 postage) I was impressed enough to buy it.
Features:
The pack has useful gussetted side pockets, a lid pocket and an internal sleeve at the back of the pack ('back' meaning the side facing your back). There is a hole for a hydration tube from the top of the main compartment and an unusual front zip providing direct access to the main compartment. There is a bungee cord on the lid and a couple more smaller loops on the front.
The large front zip is supposed to be waterproof but I doubt this and you couldn't get to anything inside a pack liner of course. Some people don't like side pockets because a broad pack is not ideal in dense scrub (just don't stuff them full on such trips). Personally, I like a couple of external pockets, and side pockets keep the centre of gravity forward better than front pockets. I will probably remove the bungee cord on the lid as it only snags on branches etc. I may also remove the internal sleeve as it's not really essential, although I do slide a piece of mat foam in there (my bush seat). The side compression straps could be useful for cinching up the pack when used as a day pack/ small loads but are not really essential either.
Harness:
The back has a thin, internal HD foam sheet to give it shape and to reduce lumps sticking into your back. There are two external pads against the upper back and a lumbar pad, which are not luxuriously thick but reasonable. The shoulder straps are not thickly padded either but again are quite adequate. I assumed that the hip belt would have no more functionality than load stabilisation but I am a bit surprised at how much it actually helps take load off the shoulders if done up firmly. The sternum strap simply slides up and down to suit. No, the harness is not as good as that on my bombproof canvas 85l. 'Mecpec' but again this is designed as a lightweight pack and is indeed over 2 kg lighter! And yes, your back will get sweaty. The pack fabric seems quite strong enough to withstand some punishment and quality of construction appears high. This is NOT a frameless pack but has two narrow, aluminium stays sewn into sleeves in the back. I have found the pack to be quite comfortable on a couple of overnighters with a little over 10 kg gross weight.
Generally, I find the pack to be of good quality, reasonably comfortable, nice and light at only 800g and very good value at under $100 including postage! Those looking for an affordable lightweight pack could give it some serious consideration.