quick and easy bicycle seat cover

Step 4 Creating the Elasticized Bottom

Take the 34" X 4.5" rectangle and fold a 1/2" seam down the long
side (so your rectangle will now be 34" X 4" with one folded up edge)
- wrong sides together. Secure this fold by sewing a 3/8" seam on the
fold (3/8 from the folded edge).

Feed one end of the elastic length onto the safety pin, and then
guide the safety pin (with attached elastic) into the folded tube/seam
you just created.

Using the head of the safety pin, feed the pin and elastic with
your fingers until the elastic is slightly more than mid-way through
the folded and sewn tube (about 18 - 20"). When the pin has reached
this point, secure the elastic at the beginning of the tube (back at
the point where you fed the safety pin into the tube) by stitching
over the elastic & the vinyl. This means that the elastic isn't going
*anywhere*. Continue feeding the elastic through to the other end of
the tube.

By this point, your rectangle will have become slightly curly (as
the elastic is forced to stretch to reach the length of the tube. You
want the elastic to be able to *stretch* to the full length of the
rectangle. Once you can do this, secure the elastic at the other end
of the tube in the same way you did in step #6.

Trim elastic ends and sew both short ends of the rectangle together
- right sides together. Now you have the stretchy loop for the base!