Reading some of the advice here, I left home the great set of DriDucks I own ($17) and bought a Marmot Mica - $90 on sale for a 30 day thru hike of the Colorado Trail.
Guess what? The Marmot Mica is fragile! I wore it under my pack for perhaps 2 hrs a day for about 8 - 9 days and the pack straps wore through it. My base weight was 13 lbs and my max weight was probably 25 lbs.
So I lost $90 on a stupid jacket that was supposedly so strong.. in contrast, I've worn the DriDucks under pack straps for many overnight hikes and it hasn't given way yet. If it does, big deal - $17 lost, not $90.
But the worst thing about the Mica is that even before it gives into pack strap abrasion, it still gets you damp -- if you are even in light rain for an hour and are wearing a 18 lb backpack on you, the Mica gets damp on the INSIDE where ever there is pressure on it. So I spent every rain shower, right from the beginning of my trip, cold and damp.
The biggest myths on BPL are cr*p about durability or non-durability of various equipment. DriDucks and Mica must top the list.
Stop wasting your money on jackets like the Marmot Mica and the North Face Triumph etc.. Driducks work and aren't magically going to dissolve like toilet paper. The Mica just might.
Or deal with a few extra oz in weight and get the North Face Venture or something (11 oz or so instead of 6 - 7 oz for DriDucks / Mica).