The Sun Mountain Monsoon is a fully waterproof, packable golf jacket built for serious golfers who refuse to leave the course when the weather turns. Constructed from a premium waterproof fabric with a 15,000 mm-rated waterproof membrane and DWR finish, the Monsoon delivers outstanding protection against prolonged, heavy rain and wind at an exceptional price point. Its mechanical stretch, soft hand feel, and quiet fabric ensure complete freedom of movement through every swing — no rustling, no restriction. Part of Sun Mountain's renowned packable rain collection, the Monsoon stows neatly into its own integrated pocket, keeping your bag uncluttered and your jacket always within reach when you need it most.
At the heart of the Monsoon jacket is a 15,000 mm-rated waterproof membrane — a rating that places it firmly in serious performance waterproof territory. A 15K waterproof rating means the jacket can withstand sustained, heavy and intense rainfall over a prolonged period without allowing moisture to penetrate. The membrane is paired with a Durable Water Repellent (DWR) surface treatment that causes water to bead up and roll off the outer face fabric, preventing saturation and maintaining breathability. This dual-layer approach — waterproof membrane plus DWR finish — ensures that even in storm conditions, you stay dry from the outside in.
Unlike stiff, crinkly rain gear that fights against your movement, the Monsoon fabric incorporates mechanical stretch directly into its construction. This means the jacket moves with your body through every phase of the golf swing — backswing, downswing, and follow-through — without pulling, binding or restricting your range of motion. The stretch is built into the weave of the fabric itself rather than relying on added elastane panels, resulting in a clean, consistent feel across the entire jacket. Combined with the partial elastic waist and elasticated cuffs, the Monsoon delivers a custom, close fit that keeps the elements out without sacrificing athletic performance on the course.
The Monsoon is engineered as part of Sun Mountain's packable rain collection, meaning it folds compactly into its own integrated pocket. When packed, the jacket occupies a remarkably small footprint — easily fitting into a bag pocket, travel bag, or even a large trouser pocket. This makes it ideal for changeable-weather rounds where you may start in sunshine and face a heavy shower by the 10th tee. Simply pull the jacket from your bag, shake it out, and you are ready to face whatever the sky delivers. When the rain passes, the jacket packs back into its pocket in seconds, keeping your bag tidy and your mind on your game.
One of the most underappreciated qualities in a golf rain jacket is how it sounds — and the Monsoon is engineered to be completely silent. The fabric has a soft, quiet hand feel that produces no rustling noise whatsoever during setup or the swing. Many lower-quality rain jackets produce distracting swishing and crackling sounds that can disrupt concentration at the critical moment of address. The Monsoon eliminates this entirely, allowing you to focus on your shot rather than your gear. The soft touch also makes the jacket comfortable to wear for an entire round, even as temperatures drop and conditions worsen.
The Monsoon's weather protection goes beyond the fabric itself. A zip-through collar, combined with an inner storm flap, seals the front opening against gusting wind and horizontal rain — the conditions most likely to defeat an average rain jacket. Zippered hand warmer pockets are fitted with external storm flaps that prevent wind and rain from forcing water through the zip teeth. These layered protection details are typically found on jackets at a significantly higher price point, making the Monsoon an outstanding value proposition for golfers who play through genuine storm conditions rather than just light showers.
Despite its comprehensive waterproofing and feature set, the Monsoon is extremely lightweight — you barely notice it is there. This is a critical quality for golf rain gear, where heavy outerwear can fatigue the arms and shoulders over an 18-hole round and negatively impact swing mechanics. Sun Mountain has achieved this by selecting high-performance fabrics that deliver maximum protection at minimum weight. The result is a jacket that can be worn from the first tee to the last green without discomfort, layered over a base layer or midlayer as conditions demand, without adding unwanted bulk to your silhouette or restricting your address position.
| Specification | Detail |
|---|---|
| Waterproof Rating | 15,000 mm membrane |
| Surface Treatment | DWR (Durable Water Repellent) finish |
| Seam Construction | Fully seam-sealed |
| Stretch Type | Mechanical stretch |
| Material | 100% Polyester |
| Packability | Packs into own integrated pocket |
| Waist | Adjustable with partial elastic |
| Cuffs | Elastic |
| Collar | Zip-through with inner storm flap |
| Pockets | Zippered hand warmer pockets with storm flaps |
| Wind Resistance | Yes |
| Weight | Extremely lightweight |
| Gender | Men's |
| Colour | Navy / Black |
| Available Sizes | S, M, L, XL, XXL |
Use the measurements below to select the correct size. Values are a guide only; source: Sunmountain.com.
| S | M | L | XL | XXL | |
|---|---|---|---|---|---|
| Waist circumference (cm) | 66–71 | 71–81 | 81–91 | 91–101 | 101–111 |
| Chest (cm) | 86–91 | 96–101 | 106–112 | 116–122 | 127–132 |
| Sleeve length (cm) | 84 | 86 | 89 | 91 | 94 |
All size guide values are approximate and for guidance only. Source: Sunmountain.com.
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