What Our Gearhead(R) Experts Are Saying:"I've kept the Helium UL Pant in my summit pack all season. It's insanely light but still holds up against full-on mountain weather. I love how it slips easily over trail shoes or boots thanks to the ankle zips and gripper cuffs-it's saved me more than once when the weather turned fast."We move fast when the weather is closing in, and the Outdoor Research Helium UL Pant keeps us covered without slowing us down. Whether it's a summer thunderstorm above treeline or surprise rain on a long-distance trek, this pant delivers full storm protection in a featherlight build. Built with 2. 75-layer Toray Dermizax waterproof fabric and fully taped seams, the Helium UL Pant packs small, weighs just 5. 8 ounces, and slips easily over trail pants or base layers thanks to ankle zips and gripper cuffs. The drawcord-adjustable waistband and gusseted crotch allow for natural movement on the trail, while reflective hits boost visibility when clouds roll in. When it clears, the pant disappears into its own back pocket, ready for the next call-up.