Comments on: REI Flash Air 50 Ultralight Backpack Review https://www.DuskHiker.com/backpacking/rei-flash-air-50-ultralight-backpack-review/ Thu, 02 Oct 2025 20:31:13 +0000 hourly 1 https://wordpress.org/?v=6.9 By: Dave Collins https://www.DuskHiker.com/backpacking/rei-flash-air-50-ultralight-backpack-review/#comment-2916 Thu, 15 May 2025 19:37:19 +0000 https://www.DuskHiker.com/?p=48630#comment-2916 In reply to Rob.

I don’t believe they did.

]]> By: Rob https://www.DuskHiker.com/backpacking/rei-flash-air-50-ultralight-backpack-review/#comment-2789 Sun, 13 Apr 2025 20:38:17 +0000 https://www.DuskHiker.com/?p=48630#comment-2789 I was under the impression that UHMWPUs had a film backing (similar to mylar) making the fabric waterproof. Did REI disclose which UHMWPU was used?

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