Duvin Design Shark Bite Crew Knit Sweater in Blue. - size L (also in M, XL) Duvin Design Shark Bite Crew Knit Sweater in Blue. - size L (also in M, XL) 42% acrylic 30% polyester 28% nylon. Made in China. Hand wash. Front and back logo graphics. Midweight knit fabric with ribbed trim. DIGR-MK7. DCK30000BLU. Shop the latest in fashion from Duvin Design