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Men's base layer topsview all (18)18 products

Accelero Comp, Short Sleeve, men's, discontinued colorsby Arc'teryx$34.00$59.00Weight (oz): 4.7100% PolyesterTechnical warm weather top that combines mesh on shoulders and back
Midweight 250 Pattern Crew, men'sby Smart Wool$42.00$105.00Weight (oz): 9.2100% superfine merino woolHeaviest weight base layer top with stylish stripe pattern
Accelero Comp SS, men'sby Arc'teryx$49.00$59.00Weight (oz): 4.8Helius™—100% polyester 112 g/m˛
Viente™—100% polyester 140 g/m˛
Lightweight, highly air permeable, breathable
MTR 71 T-Shirt, men's
MTR 71 T-Shirt, men'sby Mammut$50.00Weight (oz): 4.3Polyester StretchLight knitted fabric, Great freedom, high breathability, reduces perspiration odors,

Women's base layer topsview all (6)6 products

Midweight 250 Crew, women'sby Smart Wool$39.00$95.00Weight (oz): 7.1100% Merino WoolFeminine fit with set-in sleeves & shoulder panels to eliminate top shoulder seams
Midweight 250 Pattern Crew, women'sby Smart Wool$45.00$105.00Weight (oz): 7.4100% Merino WoolMidweight crew with stylish pattern designs.
Jungfrau T-Shirt, women's
Jungfrau T-Shirt, women'sby Mammut$70.00Weight (oz): 3.5 Polartec® Power Dry®Strong, high elasticity, good moisture transport, quick-drying, anti-microbial
Phase AR Crew LS, women's
Phase AR Crew LS, women'sby Arc'teryx$75.00Weight (oz): 4.6Phasic™ AR, Phasic™ SLMoisture-wicking, Breathable, Quick-drying

Men's base layer bottomsview all (7)7 products

Microweight 150 Boxer Brief, men'sby Smart Wool$35.00$48.00Weight (oz): 3.596% Merino Wool, 4% ElasteneEmbossed elastic waistband and Coats Seamsoft thread on flatlock internal seams for increased comfort
Phase SL Boxer, men'sby Arc'teryx$39.00$45.00Weight (oz): 2.3Phasic™ SLMoisture-wicking, Breathable, Lightweight, Quick-drying
Phase SL Brief, men's
Phase SL Brief, men'sby Arc'teryx$39.00Weight (oz): 1.4Phasic™ SLMoisture-wicking, Breathable, Lightweight, Quick-drying
Microweight 150 Bottom, men'sby Smart Wool$42.00$75.00Weight (oz): 5.5100% superfine merino Coats Eloflex thread at bottom hem openeings for increased durability

Women's base layer bottoms2 products

Phase SV Bottom, women'sby Arc'teryx$51.00$79.00Weight (oz): 4.4Phasic™ SV (body) Phasic™ AR (panels)Heavyweight base layer for high output activities in cold temperatures
Midweight 250 Bottom, women'sby Smart Wool$59.20$95.00Weight (oz): 6.7100% Merino WoolWide self fabric covered elastic waistband