4-Way Stretch Fabric: Provides unhindered movement and total comfort; SPF 50+ UV protection; Flatlock seams for comfort and breathability; Odour Resistance: Supplies a greater level of hygiene and freshness; Neoprene Waistband: For a truer fit that won't ride up; Super stretch lycra construction; Fabric composition: 85% polyester, 15% elastane; :: Men > Rash Vests Size: X-Large.