Performance base layer for lower output activities in cool to cold temperatures Lightweight, effective, and comfortable, the Rho is your base layer for low and medium output on cold days. The odour-resistant Torrent™ microfleece fabric is made with wicking yarns and has an exceptionally soft brushed interior. Elastane fibres add stretch and work with the articulated patterning and gusseted crotch for freedom of movement. The waistband is designed for comfort and easy layering, and a smart thigh pocket stashes a smartphone.