With the Coolmesh windtunnel back system the Delta 25 allows moisture to evaporate and be carried away from your back. The main fabric is composed of KS100e, which is a 1000 Denier Nylon fabric coated with a Silicone/PU elastomer for improved tear strength and flex resistance. Finished with a fluorocarbon durable water repellent (DWR) that improves the water resistance of the fabric.
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