Great stretch fabric, stretchable and comfortable fit. Combination of functional materials and an innovative mesh vent design for riders of all levels. 100% polyester for cycling jersey; Bib shorts is made of 80% polyester 20% spandex with elasticity 1. high breathable quick dry polyester fabric for jersey, strong elasticity spandex for shorts. 2. full length zipper, 3 traditional back pockets for storage. 3.original brand, individual packing ,high-tech sublimation printing. 4. Elastic braces, coolmax silicon gel pad breathable, wearproof.5. even you're sweaty, the jersey never adhere to your skin, quick-dry function and make you feel more comfortable. Size chart: US Small: Height:63"-67" Weight: 110-135 lbs; US Medium: Height:67"-69" Weight: 130-160lbs; US Large: Height:69"-72" Weight: 160-180lbs; US X-Large: Height:72"-74" Weight: 175-190lbs; US XX-Large:Height:74"-75" Weight: 185-205lbs. we offer comfortable products to all bicycle users who are engaged into any particular bicycle lifestyle. Riding it in an enjoyable sporty way during the weekend or often enjoy a long bicycle holiday.