The lightweight and water resistant Sierra Designs Men's Microlight 2 Pant blocks wind and moisture on in town bike commutes and light rain on long day hikes. It's an ideal layer for traipsing around the globe because it is versatile, yet it packs down small in the included stuff sack. The elasticized waistband lets you easily slide the MicroLight on over other layers and then cinch it tight with the drawcord adjustment. You can stash your subway change or an energy bar in the two zippered handwarmer pockets or stuff your hands in when the cold wind gets to you. It's so small, you shouldn't ever leave home without it.