- O'Neill Size Chart - The primary materials that compose this product contain a minimum of 20 percent recycled content. - No matter what the plans are, you'll always be comfortable and protected from the sun in the O'Neill® Block UPF Long Sleeve Tee. Featuring UPF 50+ sun protection, it helps shield against harmful UV rays, while Hyperdry moisture-wicking technology works to pull moisture away from the skin for quick-drying comfort. The pull-on style tee features a crew neck, long sleeves, a brand graphic at the left chest & left sleeve, and mesh fabric insets at the underarm. - Regular fit. - 45% recycled polyester, 45% polyester, 10% elastane. - Machine washable. - Imported.