Theory Men's Sale

Theory's cashmere is genuinely good and the rest of the line is well-constructed for the price point — secondhand, it becomes a very reasonable proposition. The cashmere sweaters, blazers and trousers travel and store well, the fabric tag tells you most of what a piece is worth, and the minimalist aesthetic means pieces from several seasons ago don't look dated.

Shop 4 Theory deals in our collection.

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Men's Navy Blue Theory Hilles Crewneck Sweater in 100% Cashmere

99.5% · 209 ratings +$9 shipping Listed 26d ago

Theory's Hilles cut in full cashmere -- a fabric the brand rarely uses in this line.

6.0 /10

Theory $63 $395–$495$495(86% Off Est. Retail86% Off Est Retail)

Theory Hilles Quarter Zip Cashmere Sweater L Gray Knit Quiet Luxury Capsule

99.4% · 5,722 ratings +$9 shipping Listed 24d ago

Theory's cashmere quarter-zip sits in a crowded mid-market where most buyers chase the same few brands.

6.0 /10

Theory $65 $325–$395$395(82% Off Est. Retail82% Off Est Retail)

Theory Dami Cashmere Hooded Sweater Mens Small/Medium Gray Slim Fit Pullover

99.9% · 7,684 ratings +$9 shipping Listed 23d ago

Theory's Dami cashmere hoodie sits where office knitwear meets off-duty ease -- a silhouette the brand has refined since the mid-2000s into something its core wears until the elbows thin.

6.0 /10

Theory $64 $375–$395$395(83% Off Est. Retail83% Off Est Retail)

Theory Men's Cashmere Crewneck Sweater Size XL

100.0% · 14 ratings +$10 shipping Listed 15 months ago

A mainline Theory cashmere crewneck sitting well under the secondary floor where Vince cashmere usually bottoms out.

6.0 /10

Theory $64 $275–$325$325(79% Off Est. Retail79% Off Est Retail)

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Buying Secondhand Theory Menswear: What to Look For

Theory sits in an interesting spot on the secondary market. It is not a brand that attracts the same attention as Italian tailoring houses, which means pricing is often reasonable for what you are actually getting. The better Theory pieces use fabric from serious mills, and the construction is consistent enough that secondhand examples hold up well. The catch is that Theory also makes pieces in lesser blends, and the model name alone will not tell you which you have. Knowing what to look for makes the difference between a strong buy and a mediocre one.

Theory Precision and Marlo Trousers: The Secondhand Case

The Precision pant is the place to start with Theory menswear secondhand. It is a slim, flat-front trouser cut from Trofeo wool in most of its better iterations, and it retails high enough that buying it used at a third of the price makes genuine sense. The Marlo is a slightly fuller cut that works better for buyers who find the Precision too tapered through the thigh. Both show up frequently on the secondary market, often in near-new condition because they were office staples that got replaced rather than worn out. Check the fabric tag: you want wool or Trofeo listed, not a poly-heavy blend. Also confirm the waist and inseam measurements rather than trusting the tagged size, as Theory has not always been consistent about fit labeling across years.

Theory Blazers Secondhand: Chambers, Mayer, and What the Fabric Tag Tells You

Theory blazers are genuinely worth buying secondhand if you do one thing first: read the fabric composition label before committing. The Chambers and Mayer cuts are the most commonly available styles, and the same silhouette appears in both Trofeo wool (a legitimate Italian mill fabric with good drape and recovery) and in wool-polyester blends that do not hold their shape or breathe as well. The difference in how they wear over time is significant, and the secondhand price does not always reflect which version you are getting. Pieces from 2015 onward tend to be more consistently well-sourced than earlier examples from the brand's less focused era. Check for seat wear on trousers and collar roll distortion on jackets, both of which are common condition issues on pieces that were worn regularly to an office.

Theory Knitwear Secondhand: Merino and Cashmere Pieces Worth Finding

Theory's merino and cashmere sweaters are among the quieter buys in American casualwear secondhand. The lighter-weight merino styles in particular were popular in professional settings and often turn up in excellent condition. Pilling is the primary thing to check: look at the underarm panels and any area that sees friction. Light pilling on merino can often be addressed with a fabric shaver, but heavy pilling or thinning fabric is a structural issue worth avoiding. Theory cashmere is mid-weight and machine-washable in most cases, which makes it more practical than some Scottish or Italian cashmere that requires more care.

Secondhand Theory Menswear: Frequently Asked Questions

Does Theory menswear run true to size?

Generally yes, but Theory has used both 'slim' and 'regular' variants of the same model name in different seasons without always labeling them clearly in listings. A Marlo trouser from 2018 may fit noticeably differently from one from 2022. Always look for sellers who provide actual measurements (waist, inseam, chest, sleeve) rather than relying on the tagged size, especially for trousers and blazers.

How do I tell if a Theory blazer is worth buying?

Pull up the fabric content in the listing photos or ask the seller. If the tag shows Trofeo wool or a high wool percentage from a named mill, it is worth serious consideration. If it lists polyester above 20 percent of the blend, the jacket will not drape or breathe as well and is harder to justify at any price. Also check the collar and lapel area for distortion, which is a common sign of heavy wear on unstructured blazers.

What era of Theory is best to buy secondhand?

Pieces from 2015 onward are the safer buy. Before that, Theory was in a more inconsistent phase in terms of fit direction and fabric sourcing. The brand's repositioning toward cleaner lines and better mill fabrics happened gradually through the early 2010s. Post-2015 you are more likely to get a piece where the cut and fabric quality match what the brand is known for today.

Is Theory cashmere good quality?

Yes, for its price point. Theory's cashmere crewnecks, quarter-zips, and hoodies use a soft, mid-weight yarn that wears well and holds its shape if stored folded rather than hung. It is not Loro Piana or Brunello Cucinelli cashmere and does not price like it, which is the point: secondhand, a clean Theory cashmere sweater usually trades far below retail for a piece that will last years of regular wear.

Is Theory knitwear likely to have pilling problems when bought used?

It depends on the piece and how it was worn, but merino knitwear at this weight is prone to pilling under the arms and along friction points. Ask for close-up photos of those areas specifically. Light pilling is cosmetic and fixable with a fabric shaver. Thinning fabric or pilling across the body of the sweater suggests heavier wear and is harder to justify buying. Theory cashmere tends to hold up better than the merino in this respect.

Where can I buy pre-owned Theory menswear?

Right here — this page collects pre-owned and secondhand Theory menswear from live eBay listings, scored against current market pricing so the resale deals worth acting on sort to the top. Stock turns over daily as pieces sell.

Theory Men's Sale

No deals match your filters.

Buying Secondhand Theory Menswear: What to Look For

Theory Precision and Marlo Trousers: The Secondhand Case

Theory Blazers Secondhand: Chambers, Mayer, and What the Fabric Tag Tells You

Theory Knitwear Secondhand: Merino and Cashmere Pieces Worth Finding

Secondhand Theory Menswear: Frequently Asked Questions

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