Eskaay Women's Long Sleeve UV Protection Compression Rash Guard Base Layer 80% Polyamide Please follow our size chart that is shown with the images. Made of Best Quality 80/20 Polyamide / Spandex Blended Cloth, Lycra. Anti Bacterial Treated Fabric, Moisture Wicking and Flexible Stretch material. All Seams 4 needle Flat lock (Seamless Technology) Durable & Stretchable with Fabric Content. Quick drying and lightweight Product. Ideal for Sports Base Layer and Standalone Protection from UV.