Bicycle Rear Seat Carrier Bag Rack Trunk Bags Bike Commuter Bag Adjustable strap to extend the capacity up to 50L, Maximum load up to 130 Pounds. Multi-functional Bicycle Rear Seat Trunk Bag, can be use for long road ride. Ultra-durable canvas materials, durable yet lightweight,great for long distance cycling. Rainproof 1000D reinforce polyester canvas, no worries about getting wet in bad weather, also easy to cleaning. Extra wide reflective tape at back and both side of bags for a safer riding at night or dark roads.