6.5 oz., 100% Ringspun Cotton Pique; Made with sustainably sourced USA grown cotton; Athletic Heather: 90% cotton, 10% polyester; Tagless label for added comfort; Welt knit collar that resists curling; 1×1 rib sleeve bands ; Two-button placket with bottom box-stitch reinforcement; Wood-tone buttons with durable cross-stitching; Two-needle hemmed bottom; Companion to style 443m;