Premium Products Luxuriously Soft Certified by ICA. Certified Swisspers rounds use only virgin staple fiber that makes superior cotton rounds that are noticeably softer. Grown Purely on Farms The farming methods replenish the soil, protect the purity of air, water and food supplies, and preserve precious resources. Swisspers cotton is grown by a cooperative of small family-owned farms. Their fields are regularly inspected by independent certifiers to ensure the highest standards of practices.