If you routinely arrive at the crag with more chalk in the bottom of your backpack than in your chalk bag, the Arc'teryx Aperture Chalk Bag is built for you. Showing up to your latest project with chalk crumbs sucks, but the Aperture Chalk Bag has your back. The Aperture twists shut and compresses down, ensuring that the chalk you put in at home is still there when you start climbing. A snap closure means you won't lose any of the white gold in transit and the reinforced rim keeps the bag open during your desperate chalk-grabs mid crux. The Aperture Chalk Bag isn't just for the crag, it's compressibility and weight make it perfect for anything from alpine adventures to bouldering sessions. Gram conscious climbers will appreciate its 2.8oz footprint, which means if the Aperture Chalk Bag were a bottle of shampoo you be passing right through airport security. The Aperture comes equipped with a brush holder and an injection molded belt attachment/slider that doubles as a "your favorite beverage at the crag" opener. Stop losing chalk and celebrate your conservation with a sport-soda; you deserve it.