Piggyback duffel

Abstract

A piggyback duffel apparatus and system provide a modular apparatus that expands a storage capacity of a backpack and includes a detachable piggyback duffel bag that may have a vertical strap to attach to loops on a side of the backpack.

1 . A piggyback duffel, comprising:
 a body, the body having an inside space;   a vertical strap, the vertical strap running around the body in a vertical dimension of the body, the vertical strap having a first end and a second end, and the vertical strap being permanently affixed to the body;   a first connector on the first end of the vertical strap; and   a second connector on the second end of the vertical strap, the first connector and the second connector configured to be complementary.   
     
     
         2 . The piggyback duffel of  claim 1 , further comprising:
 a horizontal strap, the horizontal strap running around a circumference of the body and having a first end and a second end;   a first buckle on the first end of the horizontal strap; and   a second buckle on the second end of the horizontal strap, the first buckle and the second buckle configured to be complementary.   
     
     
         3 . The piggyback duffel of  claim 2 , further comprising:
 a second horizontal strap, the second horizontal strap running around a circumference of the body and having a first end and a second end;   a third buckle on the first end of the second horizontal strap; and   a fourth buckle on the second end of the horizontal strap, the third buckle and the fourth buckle being complementary.   
     
     
         4 . The piggyback duffel of  claim 3 , wherein:
 the horizontal strap and the second horizontal strap are compression straps, and   the first connector and the second connector are hook and loop fasteners.   
     
     
         5 . A piggyback duffel system comprising:
 a backpack, the backpack having a first loop and a second loop on a first side of the backpack; and   a piggyback duffel, the piggyback duffel having a vertical strap running a length of the piggyback duffel, the vertical strap configured to assemble to the first loop and the second loop of the backpack.   
     
     
         6 . The piggyback duffel system of  claim 5 , wherein the backpack has a third loop and a fourth loop on a second side of the backpack, opposite the first side, the piggyback duffel system further comprising:
 a second piggyback duffel, the second piggyback duffel having a second vertical strap running a length of the second piggyback duffel, the second vertical strap configured to assemble to the third loop and the fourth loop of the backpack.   
     
     
         7 . The piggyback duffel system of  claim 5 , wherein the backpack is a first material having a first weather resistant property, and the piggyback duffel is a second material having a second weather resistant property. 
     
     
         8 . The piggyback duffel system of  claim 6 , wherein the backpack is a first material, the piggyback duffel is a second material, and the second piggyback duffel is a third material. 
     
     
         9 . The piggyback duffel system of  claim 6 , wherein the backpack has a fifth loop and a sixth loop on a top side of the backpack. 
     
     
         10 . The piggyback duffel system of  claim 5 , wherein the piggyback duffel is configured as an apparatus chosen from a group consisting of an emergency first aid kit, a sleeping pad, and a crash pad.