Fit & Design: Soft jersey fabric includes 4-way stretch for a comfortable fit that moves with you Compression fit mock neck Mock neck provides extra coverage against the elements Thumbholes help keep sleeves in place Our Cold Weather Compression fabric offers warmth and supportive stretch Technology: Moisture wicking fabric absorbs moisture to help keep you dry and comfortable Our Cold Weather Compression fabric offers warmth and supportive stretch 50+ UV protection (Rated according to ASTM D6603. Protection limited to covered areas)