Seat Pack BOA WP

The BOA is the seat pack for riders who'd rather load fast than shave grams. It mounts in under a minute with dials. Cinch a load down or open it back up in seconds, gloves on, and the dials hold a heavy load tight and stable as the bag fills.

Like every EVOC seat pack, it's built to avoid bag wag. A wedge wraps the seat post and straps run under the saddle, anchoring the bag at two points so it can't sway side to side. Reinforced side panels help the bag hold its shape when heavenly laden, and a soft TPU pad on the wedge grips your post without marking it. The more you load it, the harder the weight settles into the wedge and locks the bag down.

The adjustable roll-top seals out rain and grit. Reflective strips and a rear light strap keep you lit after dark, and elastic loops on the outside allow you to carry extra layers, a pair of sandals, etc..

The seat bags are all compatible with a dropper post. Run the 9L for credit card touring, the 12L for most multi-day trips, or the 15L when you're carrying the kitchen sink.

• Quick-adjust BOA dials. Cinch the load down or open it up in seconds.
• Seatpost stabilizer prevents side-to-side movement.
• Reinforced side panels help hold the bag's shape and reduce wag. Dials add stability as loads get heavier.
• Soft TPU on the wedge grips without marking your seatpost, carbon or alloy.
• Adjustable waterproof roll-top.
• Reflective strips and a rear light strap for visibility after dark.
• Elastic exterior loops for gear that doesn't fit inside.
• Works with dropper posts.
• Three sizes: 9L, 12L, 15L.

Seat Pack BOA WP 9L 

• Volume: 9 L
• Weight: 530 g
• Dimensions: 7.5 x 17.7 x 5.9 in (19 x 45 x 15 cm)

Seat Pack BOA WP 12L 

• Volume: 12 L
• Weight: 570 g
• Dimensions: 7.9 x 19.7 x 6.7 in (20 x 50 x 17 cm)

Seat Pack BOA WP 15L 

• Volume: 15 L
• Weight: 600 g
• Dimensions: 8.3 x 22.0 x 6.7 in (21 x 56 x 17 cm)

All sizes 

• Material: Waterproof, PFAS-free fabric
• Closure: Adjustable waterproof roll-top, BOA dials

Does it work with a dropper post? 

Yes, all three sizes are dropper compatible. Clearance depends on your frame and how far your post drops, so cycle the dropper to full bottom-out and check the bag clears your tire before your first ride.

Will it scratch my carbon seatpost?

 No. The wedge has a soft TPU layer where it contacts the post, so it grips without marking the finish, carbon or alloy.

BOA or Ultra, which should I get? 

Pick the BOA for quick-adjust dials and bigger capacity (9, 12, 15L). It loads and unloads faster and carries more. Pick the Ultra for the lightest weight and simple buckles that are easier to fix on the road, in 4L or 7L. Both use the same anti-wag mount.

Which size, 9L, 12L, or 15L? 

Go 9L for lighter, faster tours and shorter trips. The 12L is the do-everything middle for most multi-day routes. Go 15L when you're carrying a full kit, cold-weather layers, or more food between resupplies.

Can I mount a tail light? 

Yes. There's a dedicated rear light strap, plus reflective strips front and back.