Coy Boy asked for this, so blame him!
The Expedition and the Asym Backpacker can be considered as being made from the same pattern, but in different fabrics and ropes.
The Asym backpacker body is made from 70 D, high thread count, tightly woven nylon with a WPB finish. Most users find the tight weave makes the body impenetrable to normal mosquitoes, and I can personally attest to the fact that the bottom can hold water, except at the Velcro. It has a silnylon fly and braided polyester covered Spectra hanging lines
The Expedition body is made from 210 D oxford nylon. It is a much less dense weave, which could make it more breathable, but, unfortunately, makes it susceptible to prodding proboscises of biting mosquitoes. One solution to the bite-through problem is that the user place a pad between himself and the hammock. The Expedition fly is made from PU coated ripstop, and its hanging lines are a stouter polyester rope.
The Expedition is bulkier and heavier, but I can't say if it is sturdier, compared to the Asym Backpacker.
The Ultralight Backpacker-Wow! I thought I was the last remaining fan of this model. The last I checked, this was out of production and I had bought the last two... I do like the Asym, but was entirely happy with the ULB. As the Asym Backpacker is the lightweight twin to the Expedition, the Ultralight Backpacker is the slimmed down version of the original Hennessy Hammock, with the original diamond shape. The fly is proportionally smaller than the Asym and Expedition. (Tom had many requests for a larger fly.) The hanging ropes are bare Spectra cordage, easily subject to abrasion. Tom MAY have introduced the "Treehugger" straps with this model. I like it because it packs a little smaller, and weighs up to a half pound less. I can get my MLD poncho tarp to JUST fit over it and leave the fly at home in mild conditions. For true summer, I need to make a slightly larger/wider fly so that I can have enough ventilation. (Gasp!)
To see a nice model comparison chart, try the Hennessy site, or click on the link, below:
If you don't mind the extra weight and bulk, go with the Expedition. I gave up the extra space and greater fly coverage for the lesser weight of the Ultralight Backpacker for my longer trips. That should indicate to anyone that I value the weight reduction enough to cough up extra bucks!
PS-One can order the Asym with 1600 test ropes to increase its weight rating to 250 lb. I don't think the fabric is the cause of the weight restriction compared to the Expedition.
From: "Coy" <starnescr@...
Subject: Re: HH - Expedition vs. Ultralight question!
Marta, you are thinking of the Racer. As Scot just posted the biggest differance between
the Ultralight and Expedition is the fly. I have an Expedition and a friend has the
Ultralight and the body material for mine is heavier and corser and the suspension ropes
are bigger. It probably lets in more air through the bottom but not much more. The
weight rating is also 250 for mine and 200 for his IIRC. I think the Backpacker Asym is
between these 2 modles but rated the same 200 lbs as the ultralight. It uses the silnylon
fly but is a tad heavier than the ultraligh but lighter than the Expedition. Now Rosaleen
can chime in and really set the record straight:') Rosaleen?
[Non-text portions of this message have been removed]