Patagonia R1 Bottoms
9.3 oz / 264 g
6.8 oz Polartec® Power Dry® 93% Polyester, 41% Recycled / 7% Spandex
Here's what other sites are saying:
As a cold-weather baselayer, R1(R) Bottoms yield simple but important qualities: excellent stretch, high compressibility, and surprising warmth. The clean, formfitting cut and smooth jersey face make for frictionless layering.