Okay, so if you hate dealing with sunscreen on your arms, these sun sleeves are about to become your new best friend! Just slip them over any short-sleeve shirt and boom - you've got UPF 50+ protection that blocks 98% of those nasty UV rays. The fabric is this super soft ZnO material that feels amazing against your skin - lightweight, stretchy, and breathable. They fit snug but still move with you perfectly. The open cuffs make them easy to get on and off. They're perfect for everyday stuff like walking the dog, gardening, hanging out on the patio, or just running errands around town. They come in different sizes from XS to L/XL with sleeve lengths from 15 to 16.5 inches. Just toss them in the washing machine when they need cleaning. Quick note though - these aren't for swimming since they're not chlorine or salt water resistant. But for pretty much any other outdoor activity, they're absolutely perfect protection without the greasy sunscreen feeling!