Step 2 Sew elastic to material using a zigzag stitch and ball-point needle. The key is to start conservatively, so that there is no risk of overstretching or deforming them. It's why those fibres are often used to give a garment greater stability. When on the hunt for comfortable polyester-blend clothes with lots of stretch and give, try searching for a spandex component. This method may stretch clothes some, but it can damage the cloth fibers and cause your clothes to lose their shape, function and style. The spandex will always return to its original size after stretching and being laundered. For example, if the material that the elastic is being sewn to is 20 inches long, cut the elastic at 18.4 inches. Gather the material to the elastic while sewing to create a natural stretching effect. Anything with silk, linen or cotton in it, in particular, will hardly stretch at all. on Jul 28, 2017. So, in order to stretch a considerable amount goes a little beyond and that will suffice the need. Then stretch by hand and air dry - hang or lay on a towel and hope it worked! In addition, you may tear or rip the seams, accessories and other materials. Answer + 2. The mystery of how to make your clothes stretch without ruining them lies in the space between the fabric fibers. For this method too, the stretching requires air-dry. Shirley Heikkinen. Cotton, wool and cashmere shirts are more likely to stretch than silk, polyester, rayon or acrylic, but regardless of the fabric type, it’s worth a try to stretch it before tossing. Lay the dress flat and gently stretch it out, pulling sleeves out to their desired length, and pulling the skirt out to the desired length. Fill a tub or sink with cool water. I would wash cold, inside out. Mix ¼ cup of hair conditioner into the water. While sewing, you stretch the elastic to create the give and pull desired of the material. Weigh down the top of your dress too, along with sleeves if you’re stretching sleeves. However, it is possible to stretch the sleeves to the perfect length. Answered. Set a weight or other heavy object on each corner of the skirt of your dress once you’ve stretched the fabric to the desired length. Make sure that you stretch it enough or more since spandex is a kind of fabric which is made to retain its original shape. Thanks, Hometalkers! Helpful. on Jul 28, 2017. Place the sweater on a table, spray it on both sides with water until moist, then stretch it with your hand and hold for a minute or two before releasing. The amount knitwear will stretch depends on several things, primarily the fibre (cashmere, merino etc), the elasticity of the yarn, and the way the garment is knitted (tightness, or structure such as cables). Well, the continuous tension of the fibers of the spandex helps it to stretch out and relax permanently. Many running outfits are made of a polyester/spandex blend, as they should be comfortable for flexible and agile activity. No. Spandex is low maintenance and is another manmade fiber made to be strong and water resistant. Reply. 5 answers Naomie Moore aka baileyanddaisey, Castaic CA. How do you stretch half cotton/half polyester shirt?