Athleisure typically uses knits with good stretch and recovery: single jersey or interlock with 3–8% elastane, light french terry, and cotton-polyester blends that dry faster. Look for fabric that does not bag at knees and elbows, feels pleasant and resists pilling. Weight ranges from about 160 to 280 g/m² depending on the garment: top, jogger or hoodie. For intense sport, pure polyester breathes better, but for everyday wear cotton with elastane stays more comfortable. Ask for samples and test them in real wear.
Which fabrics suit athleisure and casual sportswear?

athleisurestretchtrend
Finishing & performanceHow do I test shrinkage before cutting a full lot?
Cut a square or rectangle from the actual roll, mark 50 cm distances in length and width, wash and dry as the future care label will say, then measure again.
Finishing & performanceWhy does a T-shirt twist after washing (spirality) and can finishing help?
Sideways twisting of seams, called spirality or torque, appears when yarns are overtwisted, when the circular machine has few feeders, or when the tube was set…
Finishing & performanceWhy is knitted fabric with elastane heat-set on a stenter?
Heat-setting stabilises dimensions and stretch: fabric with elastane usually passes on the stenter at about 170–195°C for a few tens of seconds, so width and GSM…