Helly Hansen Stripe Boxer Don't reduce your performance by wearing cotton or polyester next to skin. Ideal for high intensity activities in warm to cool conditions, these lightweight, close-to-body fitting, stretch LIFA® pants with low-bulk flat lock seams increase comfort and improve performance by rapidly transporting moisture away from the skin and aiding the body to maintain its optimal operating temperature. These pants are also permanently resistant to microbial growth and odour retention.