Built for the in-between.

When it is too chilly 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 cool morning runs, while the soft stretch fabric hugs without restriction. The contoured fit layers easily under run shorts, joggers or shell pants, making them just as useful for trail runs and hikes as they are for layering on travel days or in the backcountry.

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 & Specs

• Best For: Shoulder season runs, hiking, travel, and layering under joggers or shells
• Fabric: Lightweight mesh fabric for breathable comfort and moisture management
• Fit: Athletic cut designed to move with your body
• Performance: Balances warmth and ventilation for variable conditions
• Comfort: Soft, stretchy waistband for a secure and comfortable fit
• Packability: Compact and quick drying for easy travel and everyday use
• Fabric: 78% Nylon (Softcool), 12% Nylon, 10% Spandex
• Weight: 110g (size M)
• Fabric weight: 130gsm

Shipping & Returns

• Fast & Free Shipping: Available on all U.S. orders
• Free Returns & Exchanges: On all products as long as they are new and unwashed