SW-Motech TRAX WP M/L expansion bagTRAX WP M L accessory bag Weatherproof, robust and flexible: the TRAX WP M L accessory bag can be strapped to aluminum side cases from SW MOTECH and other brands, and offers 15 liters of additional water and dust proof storage, which can be reached quickly without opening the case. This way, you can organize your luggage better and have your purchases, camera accessories, or tools to hand quickly and easily. Waterproof accessory bag that can be lashed