When every gram counts. When every item has to fight for backpack space. You need the Exploration Convertible Trousers. Made from a stretchy but durable nylon-elastane mix, these trousers stand up to day-after-day of wear and the challenges of steep switchback trails. When it comes to the fit, they're straight down to the thigh and knee, easing at the ankle, with a regular front and waist but a slightly higher back. But perhaps their best feature is their versatility. Roll up the hem for mid-morning ventilation. By afternoon you'll be zipping them off mid-thigh. When evening comes, convert them into trousers again. And don't worry about losing the zipped off bits. There's a storage pouch for that. And finally, the water-repellent finish makes quick work of light showers.