Windproof, waterproof, and highly breathable, the Helly Hansen Odin 9 Worlds 3. 0 Jacket is what we zip up for pro-level performance in the elements. The HELLY TECH Professional 3-layer construction keeps rain, sleet, and snow at bay while also allowing sweaty internal moisture to escape as we ascend the trail. Customizing comfort is easy thanks to this jacket's layering options, while rugged features like the helmet- and backpack-compatible design ensure we don't have sacrifice gear or safety. Speaking of safety, Helly Hansen also outfitted this alpine essential with a RECCO(R) rescue system transponder to help aid rescue efforts in the event of an emergency.