To create a Back Pack Sack from your material you will need to purchase the material  as described below:

Small Pouch- 1-1/2 yards $7.50

Medium Pouch 1-1/2 yards $7.50

Large Pouch 1-1/2 yards $7.50

X-Large Pouch 1-3/4 yards $8.00

X-Tall Straps 1-3/4 yards $8.00 

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