Rab Ultrasphere 4.5 Arcteryx Vertex Alpine GTX followed by a quick dip

followed by a quick dip in a river after

and the technical fit is designed for comfort under a harness and backpack

Weight: 582g

The Proton is the ideal hiker or climbers jacket for when the valley bottom is hot but higher and more exposed terrain is much cooler

Rab Ultrasphere 4.5 Arcteryx Vertex Alpine GTX followed by a quick dipRab's TILT heat reflective technology which bumps up the warmth while adding a negligible amount of weight. The Ultrasphere 4. 5 is designed to be used in conjunction with Rab's Mythic Ultra 120 Modular sleeping bag, but is actually a great, superlight and warm mat on its own. Inside the Ultrasphere 4. 5 is two layers of Rab's TILT reflective film which reduces radiant heat loss without adding weight or bulk and does not rustle at all like other heat