1. COOLING & PROTECTION - cooling arm sleeves block out over of harmful UVA and UVB rays and set you free from sunscreen,while the use of high-elastic fabrics allows you indoors or outdoors activities comfortable and happy. 2. Cool & high elasticity: cooling arm sleeves are made of high elastic ice silk fabric, which is not only cool and comfortable, but also soft and skin-friendly. 3.. Anti-slip function: compression arm sleeves adopts a transparent anti-slip design, and the anti-slip strip of the cuff is well maintained in place, which will not slip off as easily as other sleeves. Don't worry it will fall or be re-adjusted when wearing it to play golf. It can make your work or exercise more efficient 4. Thumb hole design: sleeves has a thumb hole, which can keep UV rays off the back of the hand and also hold your cooling arm sleeve in a fixed position for protection. 5. Wide range of uses: .It can also be used for outdoor activities or outdoor work, such as golf, running, cycling, baseball, basketball, gardening, fishing, etc.