2.5-layer H2No® Performance Standard shell fabrics are waterproof, windproof, breathable and highly packable. They combine a water-repellent shell fabric with a waterproof barrier and a raised pattern on the inside, instead of the interior scrim used in 3-layer fabrics. The raised pattern makes 2.5-layer fabric light and compressible, while still protecting the waterproof barrier.
(durable water repellent) fabric finish repels light rain and snow and decreases dry times. When DWR is used in conjunction with a waterproof/breathable barrier, the DWR finish keeps the outer fabric from becoming saturated so that the breathable barrier can do its job.