Base Layer Set Helly Hansen Mens XL Black Stripe Thermal Lifa Underwear Helly Hansen Base Layer Set Men XL Black Lifa Stripe Thermal Underwear. This high-performance two-piece set features Lifa Stay Dry Technology, 100% polypropylene for moisture management and insulation. The long-sleeve top and leggings have a sleek athletic fit with white stripe accents, perfect for skiing or winter hiking. The breathable knit fabric ensures a dry feel against the skin. Measurements: • Top Pit to Pit: 20" (40" chest) • Top Length: 27" • Bottom Waist: 16" (32" waist) • Bottom Inseam: 30" See the measurement photos for accurate sizing. Pre‑loved pieces often differ from the size tag, so comparing to your own clothing is the best guide. #Athleisure #Gorpcore #Stripes