Fastpacking enthusiasts require gear that can withstand challenging environments and keep up with their pace. To meet these needs, Microdose and Sealson Lab have collaborated to create the RB36 backpack.

Design and Features
The RB36 is designed by Microdose and engineered by Sealson lab, it features a 27L main compartment, side pockets that can hold 2L each, and a center pocket that can hold 5L, those are made out of Ultra Stretch™ for easy access and storage.

The backpack also features detachable 3M reflective shock compression cords and Daisy chain webbing for holding items trekking poles, ice axes, umbrellas etc...

Mobility and Accessibility
To enhance mobility, the RB36 backpack features shoulder straps designed as a vest silhouette, which is held by a 3M reflective shock cord, allowing for fast and easy movements. The shoulder straps are also made with 5mm EVA foam and feature quick-access and water bottle mesh pockets for each strap.

Materials and Build Quality
The RB36 backpack is made with high-quality materials, including Challenge UltraWeave™ 200 fabric, Ultra Stretch™ Mesh, and Tie-Dyed Nylon with a PU-Coating, which are ideal for fastpacking.

The UltraWeave™ is constructed with an optimal blend of UHMWPE & high-tenacity polyester. The tight weave is laminated with an eco-friendly adhesive to our revolutionary Challenge RUV™ film. The result is a textile that is incredibly strong, lightweight, and waterproof to 200 psi.

ULTRA™ performs in the harshest environments, in both sub-zero and tropical climates. The Ultra Stretch™ Mesh combines Ultra(UHMWPE) fibers with Nylon6-6 and spandex, providing exceptional flexibility. The Tie-Dyed Ripstop Nylon with PU-Coating is a high-performance fabric that is lightweight, comfortable, waterproof, and durable.

More information of our fabrics

Overall, the RB36 backpack is a perfect solution for fastpacking enthusiasts. With its superior materials, the backpack provides durability, flexibility, and functionality, allowing you to move faster and further with less fatigue.

• Challenge UltraWeave™ & Ecopak™
• Challenge Ultra Stretch™ Mesh
• Tie-Dyed Ripstop Nylon with a PU-lamination.
• 27L main compartment (2L each side pocket, 5L center pocket)
• 2x Detachable 3M reflective shock compression cords on side panel(AC-K03)
• Detachable 3M Reflective Shock Cord on Front Panel.
• Adjustable sternum Shock Cord Constructions
• Evazote foam 5mm closed cell foam for running vest shoulder straps.
• Detachable Shoulder Loading Straps
• 1.8MM UHMWPE Daisy Chain Webbing with 3M Reflective Fibers.
• Aluminum Hooks  (Custom Handmade WTP for ULTRA200 version)

Note : Due to the hand-dyed of Ripstop Nylon, the treatment process results in each fabric having unique variations in colour, texture. Pictures shown are for reference only, actual product may vary.

The last two images are additional panel bungee cord and hook. Please refer to  and .