Mac in a Sac Summit Men’s Down Jacket | Packable Warm Insulated Jacket Ireland

Mac in a Sac

€99.99

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About Mac in a Sac


Mac in a Sac is a Belfast-born outdoor brand with over 35 years of experience creating lightweight, packable outerwear for changing weather. The range includes waterproof jackets and overtrousers, ultralight waterproof running jackets and trousers, as well as packable insulated gilets and jackets for extra warmth without unnecessary bulk. Designed to be compact, practical and easy to carry, Mac in a Sac clothing is ideal for walking, running, travel, festivals, school trips and everyday outdoor use. With a strong focus on lightweight performance, waterproof protection and packability, the brand is a versatile choice for anyone who wants dependable outdoor clothing that can be packed away when not needed.

Mac in a Sac is available from Borderland Muff, Donegal, Ireland. Borderland Muff is an authorised Mac in a Sac stockist.

Mac in a Sac Summit Men’s Packable Down Jacket – Lightweight Warmth for Irish Weather

The Mac in a Sac Summit Men’s Down Jacket delivers exceptional warmth, packability and everyday comfort — perfect for cold Irish winters, commuting, hiking the Wild Atlantic Way or layering under a waterproof shell. With a premium duck down fill and durable 100% Nylon Ripstop outer, this insulated jacket keeps you warm down to -15°C while staying light, soft, and easy to pack.

Size & Fit

  • Regular Fit for core activities – comfortable, everyday fit suitable for walking, hiking and daily wear
  • True-to-size for most body types
  • Designed to layer easily over base layers and under waterproof shells

Key Features

  • 600 Fill Power Duck Down – excellent warmth-to-weight performance
  • 90% duck down / 10% feather blend for premium loft
  • Down-filled hood with part elasticated sides & stiffened peak
  • Durable 100% Nylon Ripstop with 1,000mm water-repellent finish
  • YKK Vislon front zip for reliable performance
  • Fleece-lined chin guard for added comfort in cold winds
  • Reflective detailing for safer low-light visibility
  • Storm cuffs to seal in warmth
  • Two concealed waist pockets – zipped for security
  • Scoop back hem for better rear coverage
  • PFC & PFOA Free – environmentally responsible
  • Packs down easily into its own storage sack (included)

Perfect For

  • Cold winter days in Ireland
  • Hiking, walking and travel
  • Daily commuting
  • Layering under waterproof jackets
  • Outdoor adventures around Donegal & the Wild Atlantic Way

Why Choose the Mac in a Sac Summit?

This jacket balances light weight, serious warmth and packability. It’s ideal for anyone who wants to stay warm without bulk — a reliable, grab-and-go insulated layer for unpredictable Irish weather.

FAQs

Is it waterproof?
The shell is water repellent (1,000mm) but not fully waterproof. Pair with a Mac in a Sac waterproof shell for complete protection.

What temperatures is it suitable for?
It is expertly crafted to withstand temperatures as low as -15°C, depending on activity level and layering.

Does it come with a stuff sack?
Yes — it packs down into its own compact sack, perfect for travel and storage.

Is the insulation ethical?
The jacket is PFC & PFOA free and uses responsibly sourced duck down.

Shipping & Returns

Fast Delivery from Borderland Muff, Co. Donegal.
We ship nationwide across Ireland with tracked delivery. Click & Collect available in-store.

Easy Returns: If the size isn’t right, simply return it unused for an exchange or refund.