6.35 oz., 95% polyester, 5% elastane; Base 2.0 where you need to retain warmth, hybridized with base 1.0 where you need breathability.; Fitted, 2-way 1/4-zip front makes for easy layering and venting; Low-profile stand collar; Secure, zip side seam pocket; Low profile thumbholes help keep sleeves in place & trap warmth
