Mechanical Stretch Fabric is a type of textile that provides flexibility and ease of movement without relying on traditional elastic fibers like spandex or elastane.Polyester 65% cotton 35% : 150 gsm / 190 gsm / 210 gsm / 245 gsm / 270 gsm Cotton 60% polyester 40%: 150 gsm / 190 gsm / 210 gsm / 245 gsm / 270 gsm Cotton 100% : 150 gsm / 190 gsm / 210 gsm / 245 gsm / 270 gsm / 300 gsm Cotton 50% polyester 50%: 180gsm