When the weather turns without warning in the field, having reliable rain protection that won't weigh you down or take up half your pack is a genuine advantage. The Mac in a Sac Packable Waterproof Jacket is built around that exact premise, offering a 10,000 mm waterproof rating and 8,000 gsm breathability in a shell that compresses down to just 20 cm x 8 cm x 8 cm and weighs between 250 g and 300 g. Constructed from 100% polyester with fully taped seams throughout, this is a no-nonsense layer that handles everything from sudden downpours on a high country stalk to unpredictable coastal conditions on a waterfowl morning. It packs into its own included stuff sack, so it earns its place in any daypack, vest pocket, or camp kit without argument.

Mac in a Sac Packable Waterproof Jacket Key Features

• Waterproof Rating: Rated to 10,000 mm hydrostatic head, meaning this jacket will hold up in sustained, heavy rain without wetting through during normal field activity.
• Breathability Rating: An 8,000 gsm moisture vapour transmission rate helps manage perspiration during active use, reducing the clammy, uncomfortable feel common in lower-spec rain shells.
• Fully Taped Seams: Every seam is sealed with tape to eliminate water ingress at stitch lines, which are the most common failure point in waterproof garments.
• Material: 100% polyester construction provides a good strength-to-weight ratio, resists stretch distortion, and dries quickly when wet.
• Packable Design: Packs into its own included stuff sack at a packed size of 20 cm x 8 cm x 8 cm, weighing 250 g to 300 g depending on size. Genuinely pocket-friendly.
• Water Repellent YKK Front Zip: YKK hardware is the industry benchmark for zip reliability. The water repellent treatment on the main zip adds an additional barrier against moisture entry at the chest.
• Concealed Adjustable Hood with Integrated Stowage: The hood adjusts for fit and stows away completely within the collar when not needed, keeping it out of the way without adding bulk or a separate stuff procedure.
• Windproof Construction: Blocks wind penetration, which is critical for maintaining warmth when layered over mid-layers in exposed terrain or elevated country.
• Elasticated Cuffs and Adjustable Hem: Elasticated cuffs seal against the wrist to keep weather out, while the curved hem features a drawcord for a closer fit around the hips, reducing draughts and improving weather protection when crouched or glassing.
• Back Venting: Provides an additional pathway for heat and moisture to escape during higher output activity, complementing the breathability rating.
• 2 Front Pockets with Reversed Zips: Reversed zip orientation keeps water from tracking into pockets. Usable with gloves on and practical for storing map sections, snacks, or a rangefinder.
• Reflective Detailing: Low-light visibility detailing, useful for safety in dawn and dusk conditions common during early morning or late afternoon hunting activity.
• PFC and PFOA Free: The durable water repellent (DWR) treatment is free from perfluorocarbons and perfluorooctanoic acid, making it a more environmentally responsible choice without compromising performance.
• Unisex Relaxed Fit: A relaxed cut accommodates layering underneath and suits a broad range of body types, making the sizing versatile across the range.

The Mac in a Sac Packable Waterproof Jacket is the kind of layer that gets stuffed into the top of a daypack and quietly becomes one of the most-reached-for pieces in your kit. It is not trying to be a technical hard-shell, but at this weight and packed size, it sits in a practical sweet spot for Australian hunters and outdoors people who need dependable rain and wind protection without committing to bulk.