Callahan Shaker Knit Off Shoulder Sweater in Cream. - size L (also in S) Callahan Shaker Knit Off Shoulder Sweater in Cream. - size L (also in S) 100% cotton. Dry clean only. Rib knit edges. CAHN-WK39. 81715. 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.