This article contains affiliate links. NonToxicFinder (Solved Labs LLC) may earn commissions on qualifying purchases at no extra cost to you. We are not affiliated with the Environmental Working Group.
Quick answer: for hand-wash-only wool, cashmere, or silk, choose an enzyme-free formula such as Heritage Park Silk & Wool (EWG VERIFIED®), because enzymes can break down protein-based fibers over repeated washes. Conventional delicates products often rely on synthetic fragrance and optical brighteners, which is why an ingredient-reviewed formula is worth looking for. Woolite, which is positioned as a gentle wash, earns an EWG Guide to Healthy Cleaning D grade.
EWG's Guide to Healthy Cleaning (ewg.org/cleaners) assigns letter grades A through F to household cleaning products based on ingredient hazard, disclosure quality, and marketing accuracy. The EWG VERIFIED® mark goes further: requiring manufacturers to submit their full formula including fragrance components directly to EWG for review, with no EWG-Unacceptable ingredients allowed. Of the three picks below, one carries the EWG VERIFIED® mark (as stated on the maker's own page) and two carry an EWG Guide to Healthy Cleaning Grade A.
One detail worth flagging upfront: enzymes (specifically proteases) are effective stain-fighters in laundry detergent, but they work by digesting protein. Wool, cashmere, and silk are protein-based fibers. Heritage Park is enzyme-free and purpose-formulated for delicate natural fibers, which makes it a fit for hand-wash-only cashmere or silk. The Puracy picks below suit machine-washable wool blends on a cold or delicate cycle, but repeated use of enzyme-based detergents on pure wool, cashmere, or silk can degrade the fabric over time.
What EWG Flags in Conventional Delicates Wash
Conventional delicates products often contain ingredients EWG identifies as concerns in its cleaning database:
- Synthetic fragrance: A catch-all term that can cover hundreds of unlisted compounds. EWG flags undisclosed fragrance as a transparency problem and a potential skin sensitizer.
- Optical brighteners: Fluorescent compounds that remain on fabric after washing. EWG's database notes these as skin irritation concerns on contact.
- Surfactant blends with poor disclosure: Some conventional detergents list surfactants generically, leaving EWG insufficient information to evaluate hazard, which lowers their grade.
Woolite Delicates and Woolite Extra Delicates Care both receive EWG Guide D grades. The Laundress Wool & Cashmere Shampoo (one of the most visible products in this space) receives an EWG Guide F grade. For a broader look at EWG-rated laundry options beyond delicates, see our guide to EWG-rated laundry detergents.
Non-Toxic Wool Wash Picks: EWG-Rated
1. Heritage Park Silk & Wool Delicates Detergent: EWG VERIFIED®
Our pick for wool wash: a wash specifically engineered for silk and wool that carries the EWG VERIFIED® mark. Heritage Park's formula is enzyme-free (the key differentiator for pure wool and cashmere), pH-neutral, and fragrance-free. Sold in a 32 fl oz bottle, it is the purpose-built option for anyone handling natural fiber garments with care. Labeled for both hand and machine delicate cycles.
EWG Status: EWG VERIFIED®
Best For: Pure wool, cashmere, silk: hand wash or machine delicate cycle
Key Note: Enzyme-free formula is gentle on protein-based fibers that enzyme detergents can degrade
Heritage Park Silk & Wool Delicates Detergent, Fragrance Free (32 fl oz) , $26.98, Buy on Amazon ↗
2. Puracy Natural Laundry Detergent, Free & Clear: EWG Guide Grade A
Puracy's Free & Clear detergent is rated A by EWG's Guide to Healthy Cleaning EWG's top letter grade for this category, reflecting low hazard across all reviewed ingredient categories, good ingredient disclosure, and no misleading claims. The formula is 99% plant-derived and concentrated (64 loads from 16 fl oz). Because this detergent is enzyme-based, use it for machine-washable wool blends on a cold or delicate cycle, as described at the top of this guide, and keep pure wool, cashmere, and silk for the enzyme-free Heritage Park wash.
EWG Status: EWG Guide to Healthy Cleaning: Grade A (Low Hazard).
Best For: Machine-washable wool blends and gentle everyday laundry
Price: $19.99 for 64 loads
Puracy Natural Laundry Detergent, Free & Clear (16 fl oz, 64 Loads) , $19.99, Buy on Amazon ↗
3. Puracy Natural Laundry Detergent Refill, Free & Clear: EWG Guide Grade A (Best Value Per Load)
The bulk refill of the Puracy Grade A formula above: 48 fl oz, 192 loads, at roughly $0.19 per load. That is the best cost-per-load of any pick in this roundup and worth considering for households that wash frequently or use the same detergent for multiple purposes. Same EWG Guide A rating, same plant-derived fragrance-free formula, same enzyme-based fabric care guidance for wool.
EWG Status: EWG Guide to Healthy Cleaning: Grade A (Low Hazard).
Best For: High-volume households and cost-per-load priority
Price: $36.99 for 192 loads ($0.19/load)
Puracy Natural Laundry Detergent Refill, Free & Clear (48 fl oz, 192 Loads) , $36.99, Buy on Amazon ↗
EWG VERIFIED® vs. EWG Guide Grade A: What the Difference Means
Both marks reflect EWG's assessment, but they operate through different programs:
- EWG VERIFIED® requires the manufacturer to submit the complete formula (every ingredient including fragrance components) to EWG for review. Products must contain no EWG-Unacceptable ingredients and meet standards for disclosure and marketing claims. It is the most rigorous standard EWG offers for consumer products.
- EWG Guide to Healthy Cleaning Grade A means EWG reviewed the product in its public database and found low ingredient hazard across all reviewed categories, good disclosure, and no misleading claims. A strong result, but the Grade A path does not always require the same direct manufacturer submission as VERIFIED®.
Heritage Park carries EWG VERIFIED®. Puracy's Grade A rating is also a strong signal: the formula is short, 99% plant-derived, and EWG's Guide lists it as Grade A.
Looking for pod or single-dose formats? Our guide to non-toxic laundry pods covers pod and tab options.
Frequently Asked Questions
Q: What makes a wool wash non-toxic according to EWG?
EWG's Guide to Healthy Cleaning flags synthetic fragrance, optical brighteners, poorly disclosed surfactant blends, and certain preservatives as concerns in laundry products. A wool wash scoring EWG Guide A or holding the EWG VERIFIED® mark is one that EWG lists in its top category (EWG VERIFIED® or Guide Grade A). EWG's marks and grades are not safety certifications: they reflect what EWG's review shows about relative hazard, not a guarantee for any specific person or use.
Q: What EWG grade should I look for in a delicates wash?
For the highest confidence in ingredient quality, look for EWG VERIFIED® products or EWG Guide to Healthy Cleaning Grade A products. Grade B is also a reasonable baseline for everyday use. Grades C and below indicate concerns worth reviewing before buying. Popular delicates brands like Woolite score D in EWG's database, and The Laundress Wool & Cashmere Shampoo scores F, a notable gap from their marketing claims.
Q: Can I use EWG VERIFIED® laundry detergent on wool?
EWG VERIFIED® speaks to ingredient review, but wool and cashmere are protein-based fibers that are sensitive to enzymes. Check whether the specific EWG VERIFIED® product is enzyme-free before using it on pure wool or cashmere. Heritage Park Silk & Wool Delicates Detergent is both EWG VERIFIED® and enzyme-free.
Q: Is enzyme detergent safe for wool?
Proteases and other enzymes break down organic matter in stains by digesting protein, but wool, cashmere, and silk are protein-based fibers. Repeated enzyme exposure can degrade natural fiber quality over time. For hand-wash-only cashmere or silk, choose an enzyme-free formula such as Heritage Park Silk & Wool Delicates Detergent.
Affiliate Disclosure: This article contains affiliate links. NonToxicFinder (Solved Labs LLC) may earn commissions on qualifying purchases at no extra cost to you. We are not affiliated with, endorsed by, or partnered with the Environmental Working Group.
