The reason they call them iPac’s is because you design the interior to fit your needs. iPac’s feature modular walls and fit blocks that can be endlessly reconfigured to accommodate your ideal mix of instruments and accessories in one portable and protective unit. Also features a rugged ballistic nylon exterior, exterior pocket w/ organizer, in-line skate wheels, and telescoping handle. Quick-lock closure. Includes padded shoulder strap and ID tag. Lightweight shock absorbing frame. Soft nylon lined interior Exterior pocket, oversized,Built-in organizer to hold pens, keys, and small accessories Nylon exterior, 1680 gauge ballistic, water and abrasion resistant. Comes with Mouthpiece pouches. The ProTec Mute bags (Item# M400 SOLD SEPARATELY) may be clipped to any case or carried separately using the removable shoulder strap. (BYE BYE BONNA!) Exterior Dimensions: 14.25(W) x 23.00(H) x 8.00(D) Weight: 12.00 lbs.