Mac in a Sac Womens Ultralite Trousers | Lightweight Waterproof Running Trousers Ireland

Mac in a Sac Ladies Ultralite Trousers – Lightweight Waterproof for Fast Movement

Go light, move fast. The Mac in a Sac Ladies Ultralite Trousers are built for runners and fast hikers who want reliable weather protection without slowing down. The ultra-light, flexible Vaporlite fabric (90% Polyester / 10% Spandex) delivers superb freedom of movement, while a 2.5-layer waterproof construction with fully taped seams keeps the rain out. At just 190 g (Women’s M), they pack tiny but perform big when the weather turns.

Size & Fit

• Close fitting athletic cut designed for fast movement
• Elasticated waist for all-day comfort and a secure fit
• Articulated knees for easier stride and better mobility

Key Features

• 2.5-Layer Construction – lightweight, protective, packable
• Highly Waterproof: 8,000 mm hydrostatic head
• Highly Breathable: 16,000 gsm for active comfort
• Fully taped seams to seal out rain
• Windproof for exposed hills and coastal runs
• Elasticated waist for a dialled-in fit
• Articulated knee for comfort and performance
• Elasticated loop for storage – packs down neatly
• Cycle straps and reflective detailing for low-light visibility
• Weight: Women’s Size Medium approx. 190 g

Perfect For

• Trail running and fast hiking
• Mixed-weather training and hillwalking
• Cycling commutes and travel
• Unpredictable Irish weather around Donegal & the Wild Atlantic Way

Why Choose Ultralite?

Serious waterproof protection, high breathability, and stretch comfort in a featherweight package that disappears into your pack — made for speed when every second counts.

FAQs

Are they fully waterproof?
Yes — the 2.5-layer fabric has an 8,000 mm rating with fully taped seams to keep out rain.

Do they breathe on hard efforts?
With 16,000 gsm breathability, they’re designed for high-output use like running and fast hiking.

How small do they pack?
Very small — the elasticated storage loop helps compress them for easy carry.

Care tips?
Close fastenings, wash cool/gentle. No fabric softeners. Line dry. Refresh the DWR as needed to maintain beading.

Shipping & Returns

Fast Delivery from Borderland Muff, Co. Donegal.
Nationwide tracked shipping across Ireland, plus Click & Collect in-store.

Easy Returns: If the size/fit isn’t right, return unworn for an exchange or refund.