Round Neck T-Shirt The Ruffty Crewneck Series is built for comfort and longevity : 1) 100% Premium Combed Cotton: High-quality natural fibers for a smoother, stronger, and softer fabric. 2) Structured Crewneck: Features a high-density ribbed collar that stays flat and resists stretching. 3) Friction-Free Seams: Reinforced shoulder-to-shoulder taping for added durability and a comfortable fit. 4) Breathable & Skin-Friendly: Naturally hypoallergenic fabric, ideal for all-day wear in any climate.