How to layer
- 1Start with a wicking base — a wool or synthetic layer next to the skin to move sweat away; no cotton.
- 2Add insulation to match the cold — a fleece or puffy mid-layer that traps warmth; carry more for colder trips.
- 3Top with a shell — a wind/rain outer layer to block weather while letting moisture out (rain gear is an essential).
- 4Keep it loose — layers roomy enough not to bind or cut circulation.
- 5Adjust as you go — shed or vent before you sweat on climbs; add a layer before you chill at rest or as the weather turns.
- 6Carry spares — a dry base layer and warm layer are a Scout Basic Essential; wet layers get swapped for dry.
When to use it
- Any hike or campout where weather or exertion changes — essentially all of them.
- Cold-weather and shoulder-season trips, where layering is a safety system.
- Teaching the "no cotton, adjust often" habit that prevents both overheating and dangerous chilling.
Common mistakes & safety
- Wet, cold clothing causes hypothermia. Damp cotton or sweat-soaked layers pull heat out fast — wicking base, breathable insulation, a shell, and swapping wet for dry prevent it.
- Avoid cotton in cold or wet conditions. It holds moisture and stays cold ("cotton kills") — wool and synthetics insulate even when damp.
- Manage sweat actively. Overdressing on exertion soaks your layers and chills you later — shed and vent before you sweat, add back at rest.
- Keep layers loose. Clothing tight enough to block circulation invites cold injury in fingers and toes.
- Carry a dry spare. A dry base layer and warm layer are your backup when something gets wet.
- Shell against wind and rain. Wind and rain strip heat fast — a shell is protection, not just comfort.
Going deeper
- Base wicks, middle warms, shell shields. Three jobs, three layers — remember the jobs and you'll layer right in any weather.
- "Cotton kills." The blunt field saying: cotton holds sweat and rain, stays cold, and won't dry — wear wool or synthetic instead.
- Be bold, start cold. Experienced hikers start a climb slightly underdressed, knowing they'll warm up fast and don't want to soak their layers with sweat.
Official source
Winter activity safety (layering) — Scouting America →Several loose layers you can add and remove, avoiding moisture-absorbing clothing, is the verified Scout principle.