210d HDPE Gridstop Outside Panel
This panel makes up the outside of the pack and is the largest panel of the three.
Composition - 210d Nylon Ripstop with an HDPE Grid, PU Coated Interior
If durability is your main concern, go with 210d HDPE Gridstop. A classic fabric in the ultralight community, 210d HDPE Gridstop has stood the test of time and has the potential to last many thousands of trail miles. The PU coated interior makes the fabric waterproof, but the nylon fibers will absorb moisture. This means exposure to wet conditions will add weight to your pack and cause the fabric to sag.