- 40L large-capacity double-back pannier bag for seat rack. Made from water-repellent fabric that resists abrasion and tearing. Water rolls off and a rainproof cover is included for downpours. - Bike luggage rack: Easy to install and remove. Suitable for mountain bike, electric bicycle, folding bike, road bike. Not for too bridal tire. - Package includes: 1 piece Bike Pannier Rack 40L Large Capacity Double Back for Seat Pannier Rack Bag. - Safe and firm: Two-point attachment system securely attaches to the rear of the bike and to the rear support bracket to keep the luggage bag in place. - Use scenarios: - Daily commuting or grocery runs, with reliable, weather-resistant cargo space. - Weekend cycling trips needing extra gear or clothing, with secure attachment. - Bike touring or multi-day rides in light rain, using the included rainproof cover for protection.