A dense and plush nylon stretch-mesh, knit in Italy. At 260 gsm it’s quite substantive for a mesh, making it seriously durable. With 16% elastane its got some major snap, meaning it can stretch in size, but can constrain items in place almost as well as a non-stretch fabric. This makes it the optimal stretch for rear pockets. Stretchy enough to expand but tight enough to prevent items from bouncing. Similarly it is open enough to allow water to pass through freely but dense enough to feel almost smooth when you sit on it. Ultimately what makes this stuff worth the overkill is the shear tactile emotion of it, a tight compact smooth yet forgiving touch like nothing else out there.