Porteur Rackbag - LargeDesigned to fit most common Porteur Racks by: Pass & Stow Velo Orange Soma Surly 24Pack Durable Cordura, XPAC Sailcloth, or Waxed Canvas TPU coated 420d nylon welded liner ensures waterproofness of roll top compartment Rear facing pockets are ideal for a U lock, keys, and items you want to access while riding Securely attaches to rack with 2 straps underneath Detachable shoulder carrying strap + secondary tote length strap (both included) Tie down