Define Jacket *Nulu Review — Worth it?
Quick overview — the problem this jacket solves
If you want a lightweight, flattering layer that feels like a second skin for workouts, studio classes, or casual wear, most basic zip-ups either feel bulky or lack polish. The lululemon Define Jacket *Nulu targets that gap: a slim, hip-length jacket in buttery-soft Nulu fabric built for movement, everyday layering, and a streamlined look.
Material & Quality
| Fabric (body) | 81% Nylon, 19% Lycra Elastane (varies slightly by color/style) |
| Lining | Mixtures including polyester/Coolmax blends in some colorways |
| Key properties | Buttery-soft Nulu feel, four-way stretch, breathable, sweat-wicking, good shape retention (Lycra), machine-washable |
| Construction & features | Slim fit, hip length, zippered pockets, thumbholes with Cuffins™, zipper garage, locker loop, elastic zipper pull |
| Price (MSRP) | $128 (many colorways available) |
Real-world experience — Pros & Cons
What I liked (Pros)
- Next-to-skin feel: The Nulu fabric lives up to the hype — incredibly soft, light, and comfortable for long wear. It’s one of the most pleasant zip-ups to layer over a tank or tee.
- Flattering cut: Slim, contoured fit skims the body without restricting movement. Great for classes where you want shape without bulk.
- Functional details: Zippered pockets, thumbholes/Cuffins™, zipper garage — small thoughtful features that improve usability and comfort.
- Versatile use: Works for low-impact exercise, travel, and everyday errands. Looks tidy enough for casual office settings.
- Color options: Wide range of seasonal and classic colors — easy to match with existing gear.
Where it falls short (Cons)
- Not weatherproof: This is a soft, thin layer — it offers very little wind or rain protection and is not insulated for cold temps.
- Fit can vary: Most customers find it true to size, but some report it runs slightly small. If you prefer room in layers, consider sizing up.
- Care sensitivity: The soft finish benefits from careful washing (machine wash cold, tumble dry low as recommended). Over time, like any delicate knit, the finish can dull if mishandled.
- Price point: At $128 it’s premium for a light jacket — you’re paying for fabric hand-feel, fit, and brand.
How the jacket performs in typical scenarios
- Yoga / Pilates / Studio: Excellent — stretchy, breathable, and comfortable for warm-ups and cool-downs.
- Running / Outdoor cardio: Fine for cool, dry days but not ideal in wind or rain (use a shell over it).
- Travel & commuting: Great — lightweight, low-bulk, and packs easily in a bag.
- Everyday wear: Stylish and neat enough to double as casual outerwear.
Customer feedback snapshot
Aggregate rating sits around 4.6/5 with thousands of reviews. Common themes: “buttery feel,” “great fit,” and “favorite jacket.” A proportion of reviewers mention it runs a touch small — check the size guide or try a size up if you prefer layering room.
Quick comparison — how it stacks up against alternatives
Define Jacket *Nulu vs. Uniqlo Ultra Light Down
- Warmth & weather: Uniqlo Ultra Light Down is insulated and more weather resistant — better for cold/wet conditions. Define is softer and more flexible but not insulated.
- Style & fit: Define is slimmer and dressier; Uniqlo is utilitarian and boxier.
- Use case: Choose Define for studio-to-street looks; choose Ultra Light Down for packable warmth.
Define Jacket *Nulu vs. Patagonia Nano Puff
- Insulation: Nano Puff provides synthetic insulation and better wind resistance. Define focuses on comfort and stretch, not insulation.
- Mobility: Define feels closer to activewear with superior stretch and comfort for movement.
- Durability: Nano Puff is built for outdoor durability; Define is more of a lifestyle/fitness layer.
Who should buy the Define Jacket *Nulu?
- Someone who values fabric hand-feel and a slimming, athletic silhouette.
- People who want a comfortable studio warm-up layer or a stylish everyday zip-up.
- Travelers and commuters who prefer a lightweight, packable top for layering (in dry conditions).
- Not the best pick if you need heavy insulation, windproofing, or a rain jacket.
Fit & sizing tip
Most reviewers report it fits true to size or slightly small. If you prefer wearing thicker layers underneath or want a looser fit, consider ordering one size up. Check your measurements against the lululemon size guide before you buy.
Bottom line: If buttery-soft comfort, stretch, and a flattering slim fit matter more than insulation or weather protection, the Define Jacket *Nulu is worth it. It’s a premium everyday active layer — not a technical outer shell.
Final verdict — Worth it?
Yes, for buyers who prioritize comfort, fit, and everyday versatility. No, if you need weatherproofing or heavy warmth. Overall, this is one of lululemon’s strongest “feel” pieces — it earns its price for fabric, design details, and the way it wears.
Special offer (exclusive)
If you’re interested in buying, I have an exclusive offer available through my store — reach out or check my storefront for the current discount code. Use code SAVE15 at checkout (exclusive availability through my store) for a limited-time savings on your purchase. Terms may apply; contact me to confirm the current offer before ordering.
Quick buying checklist
- Decide whether you want a snug, contoured fit (true to size) or prefer layering room (size up).
- Pick a color you’ll wear often — the jacket looks more expensive in darker neutrals and rich seasonal tones.
- If you expect rain or heavy wind, plan a lightweight shell over the Define rather than relying on it alone.
Got questions about sizing, colors, or whether this jacket is the right match for your routine? Send a note via my storefront — happy to advise and share any active promo codes before you buy.

