Features: *1. The arm sleeves are made of elastin silk (90% nylon and 10% spandex), which is skin-friendly, breathable and moisture-wicking. It is more effective in cooling and protecting your skin. No need of sunscreen when doing outdoor activities. *2. Universal size: These cooling sleeves are specially designed for both men and women, with high elasticity and good retention. No worry about slipping. *3. Cooling and UPF 50 protection: With the latest UPF 50 protection technology, the cooling sleeves can block more than 98% of harmful UVA and UVB rays, and protect you from the sunburn. At the same time, the use of high-elastic fabric makes you feel comfortable whether you are engaged in indoor or outdoor activities. *4. Wide application: Suitable for all outdoor sports and activities, such as running, golf, basketball, tennis, boating, fishing, cycling, driving or even gardening. *5. Perfect gift for ladies and men\'s birthdays, festivals, anniversaries, Christmas, Valentine\'s Day, etc. Description: *1. Color: black/white/blue/gray/purple/pink *2. Packing size: 8*8*2 cm *3. Packing weight: 60 g Package includes: 1 pair x cooling arm sleeves