Somewhere in the second year of owning an otherwise working swing glider, the material on the padding and canopy may start to disintegrate due to sun damage. Rather than purchasing a new canopy, sew a replacement that will last for at least four years.
Remove the old canopy cover from your glider. Measure the cover's width and height, including the overhang. Purchase commercial-grade canvas. Regular canvas will work, but will fade in the sun. Marine canvas has been treated, but it is thick and may be a challenge for some sewing machines.
Trace the four triangular corner pieces that hold the canopy tight. Measure the main body of the canopy and mark the measurements on your material. Add 5/8 inch for the seam allowance. Measure and mark the material again for the overhang pieces, making room for seam allowance. Pin on the pattern for the four triangular corner pieces. Cut out all material.
Turn under all of the raw edges and stitch them in place. Pin the four corner pieces to the main body of the canopy, wrong sides together. Lay the overhang sections on the main body, right sides together. Stitch all the way around. Trim the excess seam allowance.
Insure a tight fit by sewing Velcro strips that fit over the frame from the overhang to the main body of the canopy. Place two of them on each short side and four on the front and backsides. Space them evenly.
Slip the four corner triangles over the frame. Attach the Velcro binders in place and smooth down the overhang.
If you have leftover material, re-cover your glider's seat pad, or make extra pillows.