ANTI-SLIP DESIGN- Our sleeves are stretchy enough to fit your arm perfectly without leaving marks on your arm, comfortable and beautiful, showing the perfect curve of your arm. This is a non-slip arm sleeves, cuff design non-slip, not easy to fall off, long wear will not affect your daily life.SPORTS ARM SLEEVES-The arm sleeves are made of 85% polyester and 15% spandex, which is smooth, cool, and has strong UV resistance and moisture-wicking properties, sweat absorbing and no fade makes your skin feel fresh and cool when you're exercising. Good elastic sun protection sleeve can fit most people, both men and women can use.SATISFACTION GUARANTEE- We always stand behind our high quality Products and Services, if you have any questions on our product, please contact us as soon as possibe we will solve for you.SUN PROTECTION- With the UPF 50 protection technology, block out UV rays effectively, anti-UV index up to 50+, cooling arm sleeves block out over 98% of rays and set you free from sunscreen, protecting arm skin from sunlight. And while the use of high-elastic fabrics allows you indoors or outdoors activities feel comfortable.MULTI-PURPOSE-This Arm Sleeves are prfect for all outdoor sports and activities. The UV Cooling Sleeves will protect your skin from the sun all the time whether you're running, golfing, playing basketball, tennis, boating, fishing, cycling, driving or even gardening. Besides, it's also as a thoughtful gift for your family, friends or colleagues. It is an necessary outdoor supply for your daily life.