adidas Defender Medium Duffel The Defender Duffel Medium is multi-purpose and has loads of value. This medium sized bag has a top-loading zippered main compartment with an internal valuables pocket. One endcap is a freshPAK ventilated pocket and the other is an easy-access zippered pocket. For comfort, the Defender has wrapped webbing haul handles and a padded no-slip shoulder strap pad. The adidas brandmark is screen-printed on the side, endcap and shoulder pad leaving space for team branding.