The Outdoor Research Antimatter Pack is a super lightweight day pack that stuffs down into the size of a water bottle. This ultralight pack weighs in at only 9.9 ounces and has airy mesh straps to keep it breathable and side compression straps so you can cinch down your load. The Antimatter Pack is super easy to store in your larger luggage because it stuffs down into its own pocket and basically weighs about the same as an average stuff sack.
It even has two water bottle pouches so you can hold enough water for the day’s adventure. The Outdoor Research Antimatter Pack is seam sealed and has adjustable shoulder straps along with a removable back pad making it a great choice for impromptu outings away from the campsite.