Stay warm and dry in cool-to-cold conditions in Patagonia's warmest and most breathable baselayer. There are four seasons on Longs Peak’s shadowy Diamond—all of them cold. When the conditions say shiver, grab the lightweight yet extremely warm Patagonia Men's Capilene Thermal Weight Crew Top to insulate your core, manage your moisture and not weigh you down. The micro-grid fleece interior of Capilene® Thermal Weight provides the greatest warmth combined with the greatest breathability of any baselayer in Patagonia's lineup. Soft, stretchy and compressible, the Polartec® Power Grid™ fabric has a smooth face that glides beneath layers and a brushed fleece interior to warm your core, wick moisture and feel smooth against your skin. Capilene® Thermal Weight has 30–92% recycled content and is treated with Polygiene® permanent odor control. Features include a self-fabric collar with internal neck tape for chafe-free comfort, full underarm gussets for unhindered shoulder mobility, elastic thumb loops for secure hand coverage, flatlock seams to minimize chafing, offset shoulder and side seams to lie smoothly beneath pack straps, and a drop tail for additional coverage. Features and Specifications Polartec® Power Grid™ fabric with Polygiene® permanent odor control has a smooth face for easy layering; fabric’s open-grid pattern next to skin provides superior warmth, breathability and moisture-wicking performance; spandex for stretch and ease of movement Self-fabric crew at collar with internal neck tape for comfort; locker loop for hang-drying Offset shoulder seams eliminate chafing under pack straps Full underarm gusset for range of motion and chafe-free comfort Elastic thumb loops for secure hand coverage Flatlock seams to minimize chafing; drop tail for increased coverage Materials: 3.8-oz (129-g) Polartec® Power Grid™ fabric; Solids: 92% recycled polyester/8% spandex; heathers: 92% polyester (30% recycled)/8% spandex; both with Polygiene® permanent odor control Fair Trade Certified™ sewing Fabric is bluesign® approved 147 g (8.5 oz) Patagonia Men's Capilene Thermal Weight Crew Top Thermal Underwear