ELASTIC ARM SLEEVES-The compression arm sleeve are about 24 cm/9.45 inches in length, with strong elasticity, can be used as arm sleeves for kids, sometimes arm sleeves for children, as leg sleeves.fit arm of age 3-12. SUN PROTECTION SLEEVES - Sun Sleeves for girls can protect your skin from sun exposure and UV radiation from sunburn and tanning, with extremely strong UPF50+ protection from UV rays. Far more effective in protecting your skin than sunscreen, which only lasts 2 hours and you can hardly choose from the many categories. COOLING SLEEVES-Made of cooling material,uv sleeves to cover arms for boys has excellent wrinkle resistance, strong sweat absorption, light, soft, breathable and cool, and dry-quickly, providing you with excellent breathability and comfort in the hot summer.Effective prevention of mosquito bites in outdoors. OCCASIONS OF USE- Sunsleeves Can be used as an arm shield against the sun and elements, tattoo cover up sleeves, compression sleeves, running arm sleeves,football arm sleeves, basketball arm sleeves, shooting sleeves, or basketball shooter sleeves. sports arm sleeve is a must-have for your life and especially useful in summer. Tip: Only the black arm sleeves can completely cover up the tattoo! QUICK DRY: This arm warmers uses 90% nylon and 10% spandex, This is a quick-drying technology material that can be washed repeatedly by hand. After washing, it can be naturally cooled for a short time without special dehydration.