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Daypacks Core Pack 15L Performance Hiking Backpack

Core Pack 15L Performance Hiking Backpack

Rocky Mountain Underground

  • Sale
  • Regular price $159.00

Only 1 Left In Stock!

Key Product Features

  • The ultimate hiking backpack that takes you from trail to street and back again.
  • Loaded with features to get you through the toughest hikes: double sternum straps, hydration sleeve, & breathable foam back support.
  • Doubles as an urban pack in between outdoor adventures.

See The Core Pack 15L Performance Hiking Backpack In Action

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Core Pack 15L Performance Hiking Backpack

When you’re on the trail, reach for a daypack that can keep up; the RMU Core pack Performance Hiking Backpack. Purpose built for treks, hikes, and trails, this hiking backpack has it all. Weatherproof 420D nylon fabric offers the perfect balance between long term durability and lightweight comfort. Multiple built in pockets and straps keep you organized. The full height side zippers provide easy access to the main compartment and the large front pocket is loaded with straps and slip pockets to store your gear. This travel backpack is designed to withstand an outdoor adventure but doesn't have to stay off roads. The sleek design and organization pockets make it great for urban exploring as well. The hydration reservoir doubles as a laptop sleeve and the waist belt can be removed when you take it from the trail to the street.



  • Weatherproof 420D nylon fabric with polyurethane coating.
  • Large front pocket with straps and slip pockets to store your gear.
  • Fleece lined sunglasses pocket.
  • Breathable shoulder straps and back panel combined with EVA foam lumbar support make it a comfortable carry, even on the longest days.
  • Double sternum strap.
  • Removable waist belt and back panel frame.
  • Hydration sleeve that doubles as a laptop sleeve.
  • Front side elasticized sling offers additional external storage and hides in the front panel when not in use. Great for strapping a light jacket or shoes to the outside of the bag.



  • 18.5” H | Weight: 2.5 lbs | Volume: 15 Liters


Free domestic shipping for all orders over $49.

Depending on the product and availability, your order should ship in 2-5 business days. You will receive a confirmation email with a tracking number and the carrier when your order ships so you can track your package and know exactly when to expect it. Average transit time is 3-5 business days.

We do not offer expedited shipping, but if you need your delivery rushed please contact us at and we will attempt to expedite your order.

Currently we do not ship internationally.

If you bought multiple items they might ship separately.


If you are not happy with your purchase for any reason in the first 30 days, contact us at and we'll help you initiate a return.

Please note that items must be unused with the original packaging intact in order to receive a refund. Refunds will only be processed after the item is received and its condition is verified.

Return shipping is the responsibility of the purchaser.

Our Shipping & Returns page has all of the details.

Our Promise

We want to make sure you’re happy with your product, your purchase, and everything in between. We hope you’ll love every product you buy from Flashpacker Co but understand sometimes things go wrong. When that happens we’ll do everything we can to make it right.

Check out our Satisfaction Guarantee page for the full details.


Rocky Mountain Underground


Rocky Mountain Underground

RMU started with humble beginnings building skis for friends in their basement. Word got out about their high quality and innovative designs and before they knew it everyone was looking for RMU skis. RMU has grown into a reputable ski and snowboard manufacturer building exceptionally high quality and sustainable products. Their skis are still produced by hand with a low waste and high durability emphasis in every product.

This commitment to quality extends to Rocky Mountain Underground bags and gear. Every bag is uniquely designed to keep you moving and enjoying the outdoors. We love the exceptional quality and innovative designs that go into every RMU bag. When you need reliable gear for outdoor adventures, look no further than Rocky Mountain Underground.

Product Warranty

Every Rocky Mountain Underground bag is backed by a lifetime warranty against defects in manufacturing.

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