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For daily training, recovery miles, and repeat work in cooler weather, these first-layer pieces help keep movement consistent and distraction low.\u003c\/p\u003e\n\u003ch2\u003eHow to Layer These Pieces\u003c\/h2\u003e\n\u003cp\u003eUse these styles as the foundation under \u003ca href=\"\/collections\/mens-running-long-sleeves\"\u003emen's running long sleeves\u003c\/a\u003e when you need adaptable coverage, or switch to \u003ca href=\"\/collections\/mens-merino-running-clothes\"\u003emen's merino layers\u003c\/a\u003e when colder conditions call for more natural insulation and odour control. A mesh base layer is the better choice for higher-output sessions, while merino suits easier winter runs and long aerobic work. If conditions turn wet, windy, or exposed, add a light \u003ca href=\"\/collections\/mens-running-jackets-vests\"\u003emen's running jacket\u003c\/a\u003e over the top instead of doubling up on bulk. For broader layering options across the same category, explore the \u003ca href=\"\/collections\/running-base-layers-and-running-underwear\"\u003efull base-layer system\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"mesh-base-layer-singlet-grey-601-xmrbl31c601","title":"Mesh Base Layer Singlet","description":"The Mesh Base Layer Singlet is designed for performance layering. The lightweight mesh fabric wraps around the body with balanced stretch, syncing with your movement for a second skin feel. Highly breathable and exceptionally moisture-wicking, it keeps you dry and comfortable in all conditions. 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