Here's my reply from POE customer service when I asked whether my lighter than specs pad was a 2nd, or what...
This is accurate.
Our Peak Elite AC pads are lighter than originally planned.
The reason for this is our original weight is from a sample piece. Once this item was put into production it is even lighter which is a nice surprise. No it is not missing anything. There is always a slight variation from pad to pad. We have been seeing pieces from 10 oz. to 12 oz. with a mean of about 11.5 oz for the 'regular' length. So for the Petite length you should be a little lighter than that. Which you are.
So your pad is exactly where it should be.
If you have any more questions feel free to contact me.
Pacific Outdoor Equipment, Laken and Baladeo USA