The Arc’teryx Zeta SL Pants offer long ankle-to-thigh water-resistant side zippers, a zip-and-snap fly, and adjustable elastic waistband. They are made with Gore-tex Paclite (a breathable, 2.5-layer waterproof fabric) with a 40 denier nylon face – a very nice feature for durability. We recommend these pants when you expect to hike in the rain for several hours a day (due to the excellent ventilation they provide), or need something that’s more durable than lighter “ultralight” options for bushwhacking or light rock scrambling.