Z Supply Sweater Review: Sizing, Fit, and Fabric After Six Months

Z Supply’s sweaters aren’t cashmere-quality — but neither is the price. The question is whether they land in “good value” or “fine at best.”

I own three Z Supply sweaters. A rib-knit pullover, a slub crew that’s been in rotation since early autumn, and a relaxed boxy pullover I bought on sale for around forty dollars. All three have been through enough wash cycles that I can speak to how they actually age, not just how they look at the checkout. Z Supply sweaters are one of the most contested categories in the brand — the reviews split hard between “perfect everyday piece” and “pilled in a week” — and that split tells you something real about what you’re buying. For the broader brand position, my Is Z Supply Worth It? goes into the whole catalog, and you’ll find Z Supply placed in our bigger Affordable Fashion Brands guide alongside the denim names that share its elevated-basics shelf. This is the sweater-specific version.

The Z Supply Sweater Lineup

The catalog rotates but the building blocks don’t. There are three sweater families that define Z Supply’s knitwear: rib-knit pullovers, slub crews (the most popular family — looser, nubby texture), and relaxed/boxy pullovers in heavier loomed knits. Cardigans are a separate category, covered in my Z Supply Cardigan if that’s what you’re actually shopping for.

The rib knits are the slimmest cut in the lineup. They sit close to the body, show your frame more than the others, and work well under blazers and cardigans as a layering piece. The slub crews are the volume seller and the piece you see most often in Z Supply marketing — boxy cut, mid-weight, the fabric has that deliberately uneven nubby texture that looks intentional rather than cheap. The relaxed pullovers are the loosest cut and the heaviest fabric — closer to a lazy weekend piece than a wear-under-a-coat piece.

Fabric Blends Explained

This matters more than the silhouette. Z Supply uses three dominant fabric families across its sweaters: cotton-heavy blends, rayon-heavy blends, and what the brand markets as “cashmere-blend” pieces that are usually a small percentage of cashmere mixed with a large percentage of something cheaper.

Cotton-heavy is the most durable. My slub crew is cotton-dominant and after thirty-ish wears and maybe twelve washes, it looks basically new. The fabric has softened slightly but the structure is intact, no pilling, no distortion, no color loss. Rayon-heavy is the opposite story. My rib pullover is rayon-dominant and it’s softer to the touch than anything cotton, but it’s visibly pilled after six months, and the hem has stretched down about half an inch from its original line. The cashmere-blend pieces are the hardest to evaluate — on the one I owned briefly (returned), the cashmere content was so low it didn’t meaningfully change the feel from a regular rayon knit. At the markup Z Supply charges for those, I’d pass and buy a rayon-blend instead.

If I were walking a new Z Supply buyer through the sweater section, I’d tell them: buy the cotton-heavy slub crew. It’s the piece where durability and price actually align. Skip the cashmere-blend marketing. The rayon options are for specific drape-priority use cases only.

One more thing on fabric: pay attention to the specific percentages on the content label, not just the first word on the tag. A sweater that’s 60% cotton and 40% rayon behaves very differently from a sweater that’s 40% cotton and 60% rayon, even though both would be called “cotton blends” in casual conversation. Z Supply’s product pages do list the percentages accurately, and the five seconds of reading saves you from buying a piece that ages in a way you weren’t expecting. My most-regretted Z Supply purchase was a sweater I assumed was cotton-heavy because the photo read that way, and the content label told a different story once I checked it.

Fit Notes by Style

The rib pullover runs true to size. I’m 5’6″, 140 pounds, and a medium in most Z Supply, and my rib pullover is a medium that fits exactly as you’d expect — close through the body, slightly stretchy, hits at the hip bone. If you want it to look oversized, size up one. Otherwise TTS.

The slub crew runs oversized. A medium on me drops off the shoulder slightly and the sleeves are long enough to push up into cuffs. This is by design — Z Supply photographs them this way and the marketing copy calls them “relaxed” — but if you want a closer fit, size down. I briefly owned the small and it was too tight through the bust, so I went back to the medium and accepted the drop shoulder.

The relaxed/boxy pullovers run oversized by design and cannot be sized down meaningfully. A small is still going to fit loose. A large is going to look like a blanket. Buy your normal size and expect the piece to look like an intentional oversize. If that’s not the look you want, don’t buy this silhouette.

Pilling and Wash Test — Six Months In

The cotton slub crew has been washed about twelve times. Cold, delicate, air dry flat. No pilling anywhere I can see. No stretch in the sleeves or hem. The color (a mushroom-ish brown) has held almost perfectly. This is the best-aged piece in my Z Supply rotation, full stop.

The rayon rib pullover has been washed about ten times. Same care routine. Visible pilling under the arms and where the bag strap rubs. The hem has stretched down about half an inch permanently and the front hem now droops slightly where it never did when new. The color has held but the fabric looks tired in a way the slub crew doesn’t.

The relaxed boxy pullover has only been through about six washes because it’s a heavier piece and I wear it less. It looks fine so far — no pilling, no structural issues — but it’s the newest and I can’t yet speak to where it’ll be at a year. My expectation is that the heavier fabric will outlast the rib but underperform the slub.

One universal observation: none of my Z Supply sweaters go in the dryer, ever. The one time I ran the rib through on low by accident, it lost about two inches in length and never recovered. This is a flat-air-dry brand. Budget the dry time into your wardrobe planning.

The Honest Negative

Z Supply’s sweater pricing is the friction point. These sit in a range where they should perform better than they do on pilling and should have better shoulder-seam construction than they do. The rib pullover in particular is overpriced for what you get — I’d price that piece about fifteen dollars under where Z Supply retails it. The slub crew is the exception because it actually earns its price tag through the cotton-heavy construction and the way it ages. If you’re considering a sweater purchase from this brand, the move is to wait for a sale on the cotton slub crews, avoid full-price rayon ribs, and never pay markup for a “cashmere-blend” piece that’s 90% something else.

The Verdict

Z Supply’s sweater category has one clear winner and a lot of fine-but-overpriced backfill. Buy the cotton-heavy slub crew in a neutral color, size it according to how loose you want it to look, and expect it to last at least two seasons of hard rotation. The rib pullover is worth it only on sale. The boxy relaxed pullover is a mood buy — fine if you love the aesthetic, skippable if you don’t. Skip the cashmere-blend marketing and any bold colors or prints. If you want to browse the current catalog, https://www.amazon.com/s?k=z+supply+clothing&tag=tumbleweed03b-20 is the DTC route, Z Supply Sweater on Amazon carries a subset at similar pricing, and Z Supply Sweater on Poshmark is where I’d look for secondhand if you want to try the brand without the markup.

FAQ

Do Z Supply sweaters pill?

It depends on the blend. The rayon-heavy pieces (like the rib pullover) pill within the first six to eight wears, especially under the arms and on the forearms. The cotton-heavy pieces (like the slub crew) hold up much better — mine shows no pilling after six months of regular rotation. Choose your fabric based on how hard you are on clothes.

Are Z Supply sweaters warm?

Mid-weight. These are transitional-season pieces, not winter pieces. The relaxed boxy pullovers in the heavier loomed knits are the warmest of the bunch and can handle mid-30s weather with a coat over them. The rib and slub pieces are three-season layering sweaters, not cold-weather outerwear replacements.

What size should I get in a Z Supply sweater?

Rib pullovers run true to size. Slub crews run oversized — size down if you want a closer fit, or stay TTS for the intended drop-shoulder look. Relaxed/boxy pullovers run oversized by design and can’t be meaningfully sized down. I’m 5’6″, 140 pounds, and wear a medium across the board.

Are Z Supply sweaters machine washable?

Yes, on cold and delicate. Never tumble dry — I learned this the hard way with a rib pullover that shrank two inches. Always flat air dry, and budget a full day of drying time. This is the single biggest care rule for the brand.