Here's what other sites are saying:
Give yourself some impact protection while you ride with the Norrona D30 Removable Back Protector. Compatible with the Skibotn 15L and Fjora 18L packs, this backpack liner works to absorb impact energy when you take a digger on the trail. The D30 material is soft and flexible as it sits in your pack, but locks up tight to dissipate force upon impact. When the energy from the impact subsides, it immediately returns to its flexible state, helping you ride the trail with peace of mind. Plus, you can also take it back out during hard-packed days at the ski resort.
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