The Revelate Designs Spinelock Seat Bag integrates user tested and approved features like a one-way air purge valve, rear light slots, loop and bungee deck, and an external plastic bottom with a new patented attachment system built for stability

•Innovative Spinelock stability system completely eliminates side to side sway
•Two mounting positions to accommodate seatpost setback and saddle adjustments
•Low profile, high strength, forged aluminum clamp works in combination with precision IGUS bushings to form a quick-release pin interface making bag removal a cinch
•One way, low profile, air purge valve
•Carbon seatpost friendly (not compatible with carbon fiber saddle rails)
•Top mounted external webbing and bungee for additional storage
•A Torx-25 wrench is needed for installation. you likely already have one on your multi-tool!
•The 10L Spinelock requires 8"/20 cm tire clearance and 6.5"/16.4 cm exposed seat post
•Attachment Method: Quick Connect
•Waterproof: Yes
•Volume: 10 Liters
•Weight: 638g.
•Color: Black
•NOTE: It is mandatory to check tire clearance prior to use, especially with full suspension bikes. Bag contact with a tire can cause a bad wreck and ruin your day. Tire damage to the bag is not covered by warranty