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For ordinary denim, turn it inside out, close zippers, wash it on a gentle cycle in cold water with similar colors, and air-dry it when practical. Those steps help limit heat and abrasion that can affect fit and color, but they cannot guarantee zero shrinkage or fading. Always follow the garment’s care label—especially for raw denim and workwear with special finishes or protective properties.

Start with the care label and the type of garment

Before washing, check the sewn-in care instructions. Denim does not all behave alike: most Levi’s jeans are preshrunk, while its Shrink-to-Fit jeans are raw and not preshrunk. Workwear instructions can vary by garment category and product, so do not assume that a routine suitable for jeans also suits every bib, jacket, or treated item. Levi’s denim care guidance says to follow the garment’s instructions; its Shrink-to-Fit information distinguishes those raw jeans from its preshrunk pairs.

Wash ordinary denim gently

  1. Prepare it: Turn the denim inside out and close the zippers.
  2. Sort it: Wash with similar colors to reduce the chance of dye transferring to lighter items.
  3. Choose the cycle: Use cold water and a gentle cycle, following any different instructions on the care label.
  4. Use detergent sparingly: If the label allows, choose a gentle cleanser. No detergent can be promised to prevent fading or shrinkage.

Levi’s recommends these precautions for its denim, including cold water and a gentle cycle. Avoid unnecessary heat and aggressive washing when retaining fit and color matters. Levi’s washing instructions

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Handle raw denim according to its instructions

Raw or unpreshrunk denim may respond differently from preshrunk jeans. Levi’s regional guidance recommends hand washing its raw denim in cold water with a gentle cleanser and says not to wring the fabric. Treat that as Levi’s guidance, not a universal rule: check the maker’s instructions for your particular pair. Levi’s raw-denim washing guidance

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Take extra care with new dark denim

New dark, black, or raw denim can transfer dye. Levi’s recommends washing it before first wear, turning it inside out, and using cold water. Keep it away from pale clothing and light-colored surfaces until you know whether it releases dye. Levi’s guidance for black jeans

Follow workwear instructions product by product

Workwear may have different care needs from ordinary jeans, and manufacturer directions can differ even within one brand. Carhartt’s general instructions vary by category: its guidance says to wash jeans, shorts, and sweats in cold water, while bib overalls have a different generic instruction. Check the specific garment’s label and the manufacturer’s product instructions rather than applying one temperature to all workwear. Carhartt care instructions

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One Carhartt denim bib product listing illustrates why product-specific directions matter: it permits normal washing up to 40°C and low-temperature tumble drying, and recommends washing inside out with like colors, avoiding fabric softener, and removing the item promptly. These are instructions for that listed product, not a blanket rule for every bib or brand. Carhartt denim bib product instructions

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Flame-resistant workwear

Do not substitute general denim-care advice for instructions on flame-resistant garments. Carhartt provides separate laundering guidance for its flame-resistant clothing, including product-specific limits and prohibited additives. Follow the garment label and its manufacturer’s instructions exactly. Carhartt flame-resistant clothing care instructions

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Air-dry when preserving fit is the priority

Air- or line-drying is the conservative choice when you want to limit heat exposure. Levi Strauss & Co.’s The Definitive Denim Care Guide (2018) says, “Line-drying preserves the fit and helps avoid possible shrinkage or fabric warping.” This is a precaution, not a guarantee. Follow the label if it permits tumble drying and you need a faster option; some specific workwear instructions do. Levi Strauss & Co., The Definitive Denim Care Guide

Choose the routine that fits your priority

Priority Practical choice Trade-off or limit
Preserving fit Use cold water and air- or line-dry when the label allows. These steps reduce heat exposure but cannot ensure that a garment will not shrink; raw and preshrunk denim differ.
Preserving color Turn denim inside out, wash cold with similar colors, and avoid unnecessary machine drying. Dark or raw denim may still transfer dye.
Convenience Use a gentle machine cycle for ordinary denim when the label permits. Levi’s raw-denim guidance favors hand washing; a particular workwear label may allow tumble drying.
Protective function Follow the garment’s specific label and manufacturer instructions. General denim advice may not be safe or suitable for treated or flame-resistant workwear.
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If denim has already shrunk or needs repair

Do not assume that washing instructions can restore a garment’s original fit. For a fit or repair issue, consult a qualified tailor. Levi Strauss & Co. says its tailors can alter, hem, repair, and customize Levi’s products; service availability may vary. Levi Strauss & Co. denim care and tailoring information

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