Built for the in-between.When it is too cold for shorts but too warm for heavy layers, the Shoulder Season Base Layer Bottoms are the perfect middle ground. Made from the same ultra breathable mesh fabric as our Egg Cradle Boxer Briefs, they strike the ideal balance between warmth, airflow, and comfort.The lightweight mesh construction keeps air moving to prevent overheating on cold morning runs or high exertion winter activities while the soft stretch fabric hugs without restriction. The contoured fit layers easily under run shorts, joggers or winter shell pants, making them just as useful for winter trail runs, backcountry climbs and hikes as they are for layering on travel days.Quick drying, breathable, and designed to move with you, these are the base layers you will actually reach for when the weather cannot make up its mind.Features & SpecsBest For: Shoulder season runs, hiking, travel, and layering for high exertion winter activitiesFabric: Lightweight mesh fabric for breathable comfort and moisture managementFit: Next to skin cut designed to move with your bodyPerformance: Balances warmth and ventilation for variable conditionsComfort: Soft, stretchy waistband for a secure & comfortable fitPackability: Compact and quick dryingPairing: Designed to complement the Shoulder Season Base Layer TopFabric Details/WeightFabric: 78% Nylon (Softcool), 12% Nylon, 10% SpandexWeight: 110g (size M)Fabric Weight: 130gsm KETL Shoulder Season Base Layer Bottom Bottom