Vintage Quarter Sleeve jersey style top

I look like I don’t know what do with my arms 😂🤦🏾‍♀️ ✨ Bought this 70s piece at a vintage shop several years ago. Only wore a few times, still in good condition. Very breathable shirt and great for summer or outdoors. No stains, and took a picture of tiny loose fabric. No size tags, fits like a medium. Smoke-free, fur-free home