The Ultralight Black Hole Pack 20L weighs less than your cup of morning coffee, yet provides burly protection for all your gear whether you're on the trail, the train or making your way through a cold drizzle. Made from our Ultralight Black Hole fabric - a lightweight, all-recycled nylon ripstop that's highly packable, weather-resistant and tough. The main compartment holds your lunch, sweater and rain shell; it opens and closes with a simple, single-pull drawcord so you can access your gear quickly and easily. Sized for essentials, the zippered stash pocket on the pack's lid keeps your passport, sunglasses and phone handy. You can lash extra gear like a yoga pad or bike helmet to the exterior via the vertical micro daisy chain. The shoulder straps and back panel feature lightweight and highly breathable mesh to dry quickly and provide a cooling airflow to keep you from overheating. When not in use, the Ultralight Black Hole Pack 20L stuffs into its own pocket. Made from 2.4-oz 70-denier 100% recycled nylon (50% postconsumer recycled/22% solution-dyed) ripstop treated with a silicone face coating and a polyurethane back coating and lined with 3.3-oz 200-denier 100% recycled polyester with a polyurethane coating and a DWR (durable water repellent) finish.