"Use this lightweight storage attachment on your ridgeline, inside D-rings or even your outside D-rings.
2 Pockets; Attaches to ridgeline or D-rings.
 
Weight: 9 Grams
Dimensions: 12.25″ x 6.5″
Pocket Size: 5.75″ x 5.75″
 
weight: 15.6 g"
 
The above wording is straight from Dutch, and his team.