Callahan Bo Pant in Green. - size L (also in S, XS, M, XL) Callahan Bo Pant in Green. - size L (also in S, XS, M, XL) Cotton blend. Imported. Machine wash. Elastic waistband. Side seam pockets. Flowy rib jersey fabric. Item not sold as set. 28 at the knee breaks to 30 at the leg opening. CAHN-WP20. 32202. 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.