Millet Tri Delta T Shirt Mens. Millet Tri Delta T Shirt MensThe Millet Tri Delta T Shirt is perfect for Summer hiking thanks to Polartec powerdry delta fabrics has a similar cooling capacity to cotton but with the quick drying and breathability of polyester.> Mens T Shirt> Regular fit> Crew neck> Short sleeves> Polartec powerdry fabrics> Machine washable