Mac in a Sac Origin 2 Full Zip Overtrousers – Packable Waterproof Rain Pants, 10,000mm Waterproof, Breathable, Black, Size L

Overview

Meet the Mac in a Sac Origin 2 Full Zip Overtrousers, a versatile rain layer designed for both urban days and outdoor adventures. Construction uses 100% polyester with fully taped seams to help keep you dry, while remaining light enough for all-day wear. The stated 10,000mm waterproof rating pairs with 8,000gsm breathability to balance weather protection with airflow, so you can stay comfortable whether you’re strolling in a drizzle or hiking on an exposed path. The combination of fabric and sealed seams aims to provide reliable rain protection while keeping weight low, making these trousers easy to carry when conditions shift.

In 2020 the collection was reinvented with refreshed branding and improved reflective detailing, boosting visibility in low light. New colours join the classic Black, offering options that suit different styles without sacrificing performance. The Origin 2 design emphasizes packability, so you can roll or fold the trousers into a compact bundle that slips into a pack or tote until rain returns.

Performance highlights

• 100% polyester fabric with fully taped seams for dependable rain protection
• 10,000mm waterproof rating stands up to heavy downpours and river crossings
• 8,000gsm breathability supports comfortable wear during activity
• Full zip opening and overtrousers design for quick, easy on/off over layers
• Packable and lightweight, ideal for travel, hiking, and daily commuting
• Reflective detailing boosts visibility in low light or dawn patrols
• Brand refresh includes fresh color options; the model shown is Black

Practical use and pairing ideas

Use these overtrousers for walks, city errands, forest trails, or overnight treks where rain may appear. They layer over base layers and lightweight pants, offering quick rain coverage without adding bulk. Pack the trousers into a bag for unpredictable weather, then pull them on when the skies darken or wind picks up.

For everyday carry, keep them handy in a backpack or tote so you can respond quickly to changing conditions. The breathable design helps reduce clamminess during ascent, while the waterproof shell helps you stay protected without overheating in milder sun breaks.

Care and longevity

Rinse after use and air dry away from direct heat. Store in a dry place to preserve fabric performance and seam integrity over time.