HIGH ELASTICITY MATERIAL - Made of cooling cotton polyamide and spandex high elasticity material, which can give you cool feeling in hot weather.New material is softer, more elastic and skin-friendly, whic with good flexibility and moisture absorption ability.SUN PROTECTION - This arm sleeves can block out almost harmful UVA and UVB rays, protecting your skin when driving, golfing, fishing, cycling, hiking, doing sports. Perfect for Indoor Outdoor Activities.SEAMLESS TECHNOLOGY - Use Seamless technology, no itchy and leaves no imprints on your arms. V-type knitting process fits your arm curve perfectly that help our arm to better release the pressure.PRACTICAL & DURABLE - The hand cover ensures full coverage, in the meantime the thumb holes can keep your arm sleeves in right place to better protect your arm and hand skin. Long usage and lightweight material that is so convenient to be with you.PRODUCT DIMENSION - The length of the sleeve is 13.4in (34cm) and stretches to 39.4in (100cm).;the wrist circumference is 3.2in (8cm), stretches to 5.1in (13cm);the upper arm circumference is 3.9in (10cm), stretches to 8.3in (21cm). Suitable for most adults,both men and women. And all these sleeves are allowed for machine wash and hang dry.