7R waterproof sack – modular drybag for the seat pack with mini rack

Choose your perfect size and color

The 7R waterproof sack is a core part of the 7R seat pack with mini rack system. It’s designed to fit snugly into the mini rack cradle, offering maximum stability, easy access, and waterproof protection for your gear.

On this page, you can buy the waterproof sack separately, giving you the flexibility to:

• Choose one of three sizes: 10L, 14L, or 17L

• Pick from a range of available colors

• Add an extra sack to your setup – for different trip lengths or gear needs

In a set you get:

• Roll-top waterproof drybag in your chosen size and color

• Shock cord netting around three sides for external storage

Waterproof materials & taped seams

Our sacks are made using Ultra or ECOPAK™ fabrics, known for their lightweight, durable, and waterproof performance. To enhance protection, all seams are taped to help prevent water ingress, even in extreme conditions.

Custom color option

Want to personalize your saddle bag system?

• We offer custom-colored sacks with a 30€ prepayment

• The total price is 15% higher than a standard sack

• Once your custom bag is ready, we’ll send you photos and charge the remaining balance before shipping

Sizes available:

• 10L – perfect for light packing or day trips

• 14L – balanced volume for most rides

• 17L – ideal for longer adventures or bulky gear

Build your ideal bikepacking system

Our seat pack system is modular – choose exactly what you need:

• Mini rack only

• Mini rack + waterproof sack

• Add detachable pouches or a backpack strap anytime