Seat Pack Ultra Waterproof

What Our Gearhead® Experts Are Saying:

"I switched to the Seat Pack Ultra Waterproof for a 200-mile gravel push, and the strap-mounted system held its position even out of the saddle on punchy climbs. No side panels meant it actually packed denser than my old frame bag, and field fixes on the straps took seconds."

The Seat Pack Ultra Waterproof solves a problem most saddle bags never quite figure out: they sag, swing, or rub through holes once a ride gets serious. This one disappears into the background, built for racers and ultra-distance riders who need a setup that holds its line on self-supported gravel races and multi-day bikepacking traverses.

The construction skips rigid side panels, letting volume flex around whatever you've packed, while a strap-based mount keeps things field-repairable and a seatpost stabilizer locks out lateral sway on technical terrain. The waterproof roll top adjusts between four and seven liters depending on the route, and the strap mount works across most post setups without proprietary hardware.