Maoko Men's Sports Athletic Vest Shirt Compression Baselayer Tank Top 6 Colors 100% Polyester. Light weight soft fabric material. Does well in the washer and dryer- very few wrinkles. Both Baselayer are nicely constructed in and out This Tank Top is especially good for travel when you need to pack light as this shirt can be washed, and dried overnight and does not wrinkle. It is easy, casual wear over jeans or leggings.