I made a pattern from the old wrist bands, then made one more pattern with folds included. I only could make half of it - it was already bigger than A4:-) The first pattern has been cut in two pieces to form a room for inserting the weights.
I serged the cut part of the first pattern. Then I ironed the folds at the second pattern and sewed it to the first piece at the marked lines. Ironed flat.
I bought a twill tape, folded it in the middle and ironed. This way I could be quite sure that when I sew at the upper half, the lower one will be caught too. I put it over the edge and sewed on.
The corners were quite difficult. I solved it like this: I sewed to the end of the side, then I sewed a bit back, I folded the tape as an arrow, pressed flat and went on sewing.
Then next step was velcro. I sewed on the tapes at the slots - I always sewed so that the tape was a cm longer than the unit (to leave a space for the weight). By the way, I wanted the wrist weights to be safe, so I sewed throught the velcro and the canvas several times.
At one end, I sewed in a metal loop, at the other I joined the soft part of the velcro with the scratchy one, pressed the seam flat and sewed to the rest with zig-zag stitch.
I bought soft duffel, cut out the shape of the wrist band (a little smaller), and sewed along the side without a twill tape. I didn't serge this piece.
This should protect a hand from being galled.
The fourth side of the wrist band was thicker and not well accessible because of the velcro bands - I decided to sew the twill tape on in hand.
You can see a stitch I used: I went up with the needle at the right side, caught a little bit at the edge of the tape, went down; at the wrong side I caught the tape from below and finished. The stitch has a zig-zag structure.
I started in the middle of the thread and tape (I made a slip knot on the thread). I sewed to the right, when finished untied the knot and sewed to the left.
At the corner I snipped the tape off leaving a small bit. I folded the end in and sewed. At this particular example I cut too much and the end frayed out. I ripped the tape off and did it again.
One should never be too lazy to repair their mistakes :-)
