The Rab Flux Pull-On Top is ideal for multi day climbs or long treks through the mountains. With a Polygiene odor control treatment, you'll stay fresh naturally as you climb or hike. The midweight material keeps you comfortable in colder, high alpine temperatures and the thumbholes secure the sleeves when you need to throw on more layers. Merrow Activeseam stitching offers strong, low profile seams that won't chafe as you pole plant mile after mile. For quick thermal control, unzip the front zipper to dump excess heat on burly climbs or zip it up when the wind kicks in and the chin guard will protect your skin from abrasion.