Under Armour Undeniable Duffle 4.0 Medium The Under Armour Undeniable Duffle 4.0 Medium is the perfect on-the-go gym bag for your active lifestyle. This medium-sized duffle offers plenty of space for your gear with a large vented section for shoes and laundry and interior slip pockets for organization. Two large zippered pockets at the front offer secure stowing of necessities. UA Storm technology offers water-resistance to help protect your items from inclement weather. Features a padded top grab handle. Large zippered main organizational section. D-ring on front panel for added attachment point. Tough, abrasion-resistant bottom and side panels. Adjustable, padded shoulder strap provides complete comfort. Large vented pocket for laundry or shoes, one mesh pocket & an additional large zippered pocket for organization.