Arcteryx Rho SV Men's Zip Neck

Skiers and climbers who run cold will appreciate the Arc'teryx Rho SV Men's Zip Neck, the warmest base layer top Arc'teryx builds in this line. A heavyweight hollow-core fleece delivers serious warmth for its weight, breathes on the move, and resists shedding for long-term durability. It is the deep-winter foundation layer for activities in severe cold.

Why we like it:

The standout is just how much warmth it offers for the weight, thanks to the hollow-core fleece. Add a tall collar and a phone-sized chest pocket and it is a base layer built with real days in mind.

Features and Functions:

The men's Rho SV uses 210 gram hollow-core fleece with a standout warmth-to-weight ratio, engineered to minimize shedding and made with recycled content. A deep front zipper vents heat and eases layering, a tall collar adds coverage, and a low-profile laminated chest pocket holds small essentials and most phones, while articulated patterning and stretch keep it mobile.

Fit and Sizing:

A fitted cut with articulated patterning and stretch layers easily and moves with you. True to size, with a snug performance cut.

Bottom Line:

For severe cold and active winter pursuits, the Rho SV Zip Neck is best at top-end base-layer warmth without dead weight. The warmest base layer to anchor a deep-winter kit.