The Diagonal

The visible crosshatch on the surface of an X-Pac panel is easy to mistake for texture or a branding choice. It is neither. It is the surface trace of a structural layer embedded inside the laminate, and the orientation of that layer, set at an angle to the face fabric, is doing specific work.

What the Laminate Contains

X-Pac is a technical fabric developed by Dimension-Polyant, a German manufacturer based in Straubing, Bavaria. The company originally produced laminate fabrics for high-performance sailing, and the carry goods application arrived as a secondary use of the same engineering logic. The standard carry grade, VX21, is built from four distinct layers bonded into a single sheet. On the outside, a 210-denier nylon face fabric handles abrasion and surface contact. Behind it, a diagonal polyester grid (the X-ply scrim) runs at approximately 45 degrees to the face weave. Behind that, a PET film layer provides waterproofness. And on the inside, a taffeta backing protects the film during sewing and daily use.

Each layer is doing one thing. The crosshatch visible on the outside is produced by the scrim below, showing through the face fabric as the signature of its fiber grid.

Why the Diagonal

In a standard woven nylon, a tear tends to propagate parallel to the weave. Once a single thread breaks under load, the path of least resistance follows the axis of adjacent threads. The structure that gives the fabric its strength is also the structure that guides its failure.

The diagonal scrim changes this. Because it runs at 45 degrees to the face weave, a tear attempting to propagate through the laminate encounters the scrim at an angle that requires it to cross multiple fibers simultaneously rather than follow any single one. The mechanical resistance to propagation increases significantly, and in most impact scenarios the tear arrests.

Dimension-Polyant adapted this approach from sailcloth engineering, where fabrics are subject to high dynamic loads in multiple directions simultaneously, and where controlled tear-arrest is a structural requirement rather than a secondary benefit. The X in X-Pac refers to the cross-ply orientation. The visual crosshatch is the pattern of that choice made visible.

What It Costs

X-Pac is stiffer than coated nylon of equivalent weight. The laminate has body, which means it holds its shape in flat panels but is harder to sew on curved seams and panel transitions. Factories without experience working with it need to adjust sewing technique and thread tension settings. Most mass-production runs default to coated nylon partly because the tooling and process is already in place.

Hyperlite Mountain Gear, working from Biddeford, Maine, has used welded X-Pac construction across their pack range for years, treating the stiffness as a structural asset rather than a manufacturing obstacle. Able Carry and DSPTCH both use VX21 in their main body panels, where the combination of waterproof film and diagonal scrim has the most impact. In each case, the decision to specify X-Pac represents an upstream commitment to a different fabric spec, a different pattern design, and a different factory conversation to make it work.

What the Pattern Signals

The crosshatch on an X-Pac panel is functional information, not surface decoration. It tells you that someone specified a four-layer laminate with a structural scrim, then adapted the patterns and found a factory capable of working with a stiffer material, all in exchange for a fabric that is waterproof, structurally resistant to tear propagation, and lighter than a comparable-weight coated nylon. The visible surface is the trace of those specification decisions. When we are evaluating materials for the range, the question the crosshatch brings into focus is worth asking directly. Does the construction match the performance claim being made? The X-ply scrim gives a clear answer.