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This versatile three-in-one jacket lets you adapt to the conditions so that you can keep hiking no matter what the weather throws at you. A breathable waterproof outer layer and a removable insulated inner jacket can be worn together or separately, so you’ll stay warm and dry right to the end of the trail. Unlike traditional, continuous-filament synthetic insulations, this small round synthetic fibre is closely clustered to mimic down clusters, trapping heat within small air pockets to retain warmth. The benefit of this synthetic alternative is that it delivers high warmth even when it gets wet. In addition, the lightweight construction of Thermoball™ promotes greater mobility across challenging terrain.