Hydrophobic, premium 6-ounce, 4-way stretch, Drylock top repels water for better warmth and comfort. Fast drying and comfortable snug "second skin" fit with thumb holes in the sleeves, a sturdy brim built into the hood, and a lower back stash pocket. This top is ideal for layering or wearing alone for maximum sun protection. Tested and UPF rated to block over 98% of UVA/UVB radiation from the sun.