Size guide Support our endangered birds with this men's organic cotton Red Bird embroidered sweat. Part of our Matt Sewell + Silverstick collection and drawn in Matt's unique style, we turned his beautiful illustration into a colorful embroidered sweat. The red bird represents all 67 species of birds on the UK's endangered red list, 1 in 4 of our birds.10% of sales from this product go to Wildcard, a grassroots environmental conservation organization focusing on rewilding Britain. 100% organic cotton Heavyweight fabric 340gms Brushed back inner face Left chest embroidery Woven hem label Recommended washed at 30° and hung dry. This Matt Sewell x Silverstick organic cotton sweat is a regular fit and true to size.