User Review: Mountainsmith Strapettes
Design: Shoulder straps
Size: If your taller than 6 feet it may not fit.
Number of Pockets: n/a
Max. Load Carried: unknown, one review said 110 pounds?
Height of Owner: 5' 10"
Price Paid: $24.95
I got this for my Mountainsmith Tour bag. I carry 64 oz of water with my other gear my pack weight is around 15 to 17 pounds.
The first thing I can tell you is the instructions are no good. The backstraps connect to your shoulder strap location but I had problems with the front. I found this link on the internet which help a lot. http://www.backpackgeartest.org/reviews/Packs/Pack%20Accessories/Mountainsmith%20Strapette/Owner%20Review%20by%20Kathleen%20Waters/ this should solve problems with the front of the straps.
They really help with the extra weight, the onlydown side is that you can't spin your pack around as easy as before, not a very big loss. I didn't come across size information but I feel if your over 6 feet tall they may not work, the chest strap may be too close to your neck.
When on the trail the only problem I found was I had them too tight. I adjusted them one time and going up and down the hills was not a problem.
I feel they should have come with the pack, but I'm glad I bought it.