To finish the soft pack you will need 48 inches of 1 inch webbing, you will need one 1 inch side release buckle with tri-slider, a swivel snap hook and a D ring and 6 inches of ¾ inch sew-on Velcro.
For front strap: take 2 pieces of fabric 4 ½ inches X 14 inches and make a tube closed at one end. Attach one piece to front side of two bags (points marked A on drawing below). Attach Velcro to appropriate sides of strap to complete adjustable closure.
For Back strap: Take a 23 inch piece of webbing and attach to inside end of bag opposite front strap, using tri-slider, attach the swivel snap so that strap length will be adjustable. Take a 4 inch piece of webbing, fold in half with cut ends together, and sew D ring to bag end opposite snap (points marked B on drawing below).
For belly strap: Take a 5 inch piece of webbing and fold in half, with one side of buckle in middle and cut ends together, and sew to middle of inside edge of bag bottom (points marked C on drawing below). Take a 16 inch piece of webbing and sew to middle edge of opposite bag (point C). Using tri-slider, attach the remaining buckle part so that the strap length will be adjustable.