[ Backpack straps; ] Backpacks; [ Backpacks compatible with personal hydration systems, sold empty; Backpacks for pets; Backpacks with rolling wheels; Backpacks, book bags, sports bags, bum bags, wallets and handbags; Military duffle bags, garment bags for travel, tote bags, shoulder bags and backpacks; Pouches and bags sold empty for attachment to backpacks; Protective fitted liners for backpacks and luggage; ] Sack packs, namely, drawstring bags used as backpacks; Schoolchildren's backpacks...