Yuba Seat Sack

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  • Regular price $12.00

The Yuba Seat Sack is a low profile, aerodynamic under-seat bike bag. This thermoformed cycling accessory is an essential item for any rider looking to quickly and safely store small personal items. Our unique combination of heat molded foam and plastic provides a generous storage area that is light and easily detachable without sacrificing integrity and durability. We know what it’s like out there on, and off, the road. You, and your stuff, can take a beating, and you need the right kind of protection for both. This was the impetus for the Yuba Seat Sack and we daresay the execution was flawless. For the cyclist that demands quality and quantity, the Yuba Seat Sack is the only bike bag you will ever need.

The Yuba Seat Sack is handcrafted in our production facility in the United States using our proprietary thermoforming and foam laminating processes. We start by laminating a layer of cross-linked, low-density, soft, polyethylene EVA foam to a layer of high-density polyethylene plastic. This pairing provides that elusive combination of rigidity and softness and is the backbone of our entire line. Then, we laminate the foam with a layer of super low-pile terrycloth to carefully cradle your personal items. Finally, we laminate the high-density polyethylene plastic with a layer of industrial strength fabric to protect your bag, and your belongings, from the elements. This foam/plastic/fabric sandwich is then thermoformed into a rigid shell that never loses its shape.

The plastic/foam shell of the Yuba Seat Sack is outfitted with a single zipper situated laterally on the upper third of the Yuba Seat Sack. The zipper traverses three sides of the Yuba Seat Sack allowing you to open the pack a full 180° so you never have to dig or squint while trying to locate items in the generous, 30 cubic inch interior.

The Yuba Seat Sack is secured to your bicycle’s seat via three adjustable Velcro® and nylon straps. The two side straps are sewn to the pack and then threaded through two ‘D’ rings; this allows the pack to adapt to a variety of seats. The third strap is located on the foremost point of the sack and wraps snugly around your seat post.


  • Interior layer of cross-linked, low-density, soft, polyethylene EVA foam laminated with super low-pile terrycloth to protect your personal items
  • Exterior layer of high-density polyethylene laminated with durable exterior fabric for long lasting, weather-resistant protection
  • Adjustable Velcro® strapping system allows for attachment to a variety of bicycles and seats
  • Low-profile aerodynamic design
  • 30 cubic inch capacity