Callahan Leni Tank in Green. - size L (also in S, XS, M, XL) Callahan Leni Tank in Green. - size L (also in S, XS, M, XL) 95% cotton 5% elastane. Made in China. Hand wash. Asymmetrical front drawstring detail. Rib jersey fabric. Item not sold as set. CAHN-WS32. 32203. Los Angeles based brand Callahan is known for their comfy sweaters and perfect boyfriend fits. Their line is elevated by unique textures, materials, and techniques that give each piece versatility and wearability. Designed for cool girls everywhere, Callahan is inspired by effortlessly easy style.