These can be worn year-round, but they have a vibe that makes you want to wear them in the spring. They also look great in the winter because they are mainly white. They are made of polyester, but the surface is smooth. The size is 38 (M-L). I'm selling them because this length no longer suits me. Color: White Pattern: Floral Silhouette: Trapezoid Season: Spring, Summer, Autumn, Winter