Brochu Walker Sidi Pullover in Taupe. - size XS (also in L, M, S) Brochu Walker Sidi Pullover in Taupe. - size XS (also in L, M, S) 37% superkid mohair 37% baby alpaca 26% polyamide. Dry clean only. Rib trim. Imported. BROC-WK26. MMS3499. Designers Lisa Brochu and Lauren Walker describe their collection of soft, luxurious cashmere as pieces for cocooning and layering. Their collection is traditional and simple, designed using soft colors and subtle details, but none the less still warm and inviting.