Patagonia Men's R2 Fleece Jacket (Andes Blue, Size L) Slim Fit: Closer-fitting. Slim-fitting technical garments may be worn over baselayers and light midlayers Exceptionally warm, directionally knit Polartec Thermal Pro fabric is breathable, compressible, wicks moisture and dries quickly Side panels, sleeves and cuffs feature R1 Polartec Power Grid for improved fit and breathability Technical fit, underarm gussets and raglan sleeves for increased mobility and comfort under outerwear and packs All zippers have Sonic/Stitch seam construction to reduce bulk and improve suppleness; soft kissing-welt zipper garage at chin for next-to-skin comfort