Icebreaker Men's ImPulse Running Short integrates their lightweight merino Cool-Lite material to bring new heights to your running capabilities. This fabric will keep you cool and dry with its natural antimicrobial and moisture wicking properties. Take these shorts on the longest of runs and still feel cool, calm, and collected. Features of the Icebreaker Men's ImPulse Running Short Air permeable Pertex Quantum air nylon fabric for breathability and optimal comfort in all conditions Cool-Lite brief liner for faster wicking Corespun fabric for enhanced durability Internal Cool-Lite lined waistband for faster wicking and comfort Waistband with internal drawcord for adjustability Zippered back stash pocket Power mesh back hip pockets Icebreaker reflective heat transfer logo Fabric Details Main: 48gm Pertex Quantum air 20 denier, 100% Nylon with DWR finish Mesh Lining: 145gm Eyelet Corespun, 51% Merino, 34% Tencel, 15% Nylon