Our iconic Zaine trousers are a polished option for every day. This version of the slim cut includes an internal drawstring and elastic side panels at the waist. It’s finished with front slant pockets and back welt pockets. The fabric is crafted of a warm, machine washable knit imbued with just enough stretch for comfort. It’s a fine blend using 80% wool sourced from certified responsibly managed farms. Paired with a button-up shirt and blazer or a tee and pullover sweater, these are the perfect everyday trousers for cool-weather dressing.
Style #:
P0791232
Fit
True to size, choose your normal size
Slim fit
Full length
Materials & Care
Composition
80% wool
17% polyamide
3% elastane
Care
Do not wash. Do not bleach. Do not tumble dry. Cool iron if needed. Dry clean with any solvent except trichloroethylene. Imported
Sustainability & Traceability
We are committed to making a positive impact on the people who wear our clothes, our industry, and our planet, beginning with our Good Fabrics. Learn more about Theory for Good
This fabric is made from certified responsibly sourced wool from ethically run farms.
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Exclusions
WELCOME OFFER
(1) Promotional Period:
From April 1, 2024 until further notice.
(2) Eligibility:
Customers who successfully subscribe to Theory Newsletters during the Promotional Period (“Eligible Customers”).
(3) Designated Store in respect of this Promotion:
The new Theory Online Store at hk.theory.com, tw.theory.com, sg.theory.com and au.theory.com (collectively “Theory Online Stores”).
(4) How to enjoy this Promotion:
Eligible Customers can enjoy 15% off on regular-priced products at Theory Online Stores (subject to the Excluded Products as defined below) (the “Discount”) by entering the promotional code at checkout. The promotional code would be sent, via email, to Eligible Customers upon successful newsletter registration.
(5) General Terms and Conditions:
The Discount only applies to the first order placed by Eligible Customers on Theory Online Stores. The Discount does not apply to the purchase of Bundles items and discounted products (the “Excluded Products”). The Discount cannot be used in conjunction with any other discounts, promotional offers and coupons (including but not limited to Theory VIP discounts/Theory VIP Birthday discounts, Credit Card Year-Round Discount and Theory CRM Coupons). The Discount cannot be transferred nor exchanged for cash or any other gifts or coupons. Theory reserves the right to amend these Terms and conditions without prior notice. Theory reserves the right of final decision in case of any dispute.
BUNDLE PROMOTION
(1) Promotional Period:
The Promotional Period is from 1 July, 2025 until further notice.
(2) Designated Store in respect of this Promotion:
Theory Online Store at hk.theory.com, tw.theory.com, sg.theory.com and au.theory.com (collectively “Theory Online Stores”).
(3) How to enjoy this Promotion:
During the Promotional Period, all customers can enjoy an additional discount upon purchasing, as the case maybe, 2 or 3 items of the same style (as may be designated by Theory from time to time) in any size or color (collectively the “Designated Items”) in one single transaction at Theory Online Stores (collectively the “Discount”). The Designated items, and the number of Designated Items required to be purchased to unlock the Discount, will be specifically marked on Theory Online Stores.
Customers are required to add the Designated Items into bag to unlock the amount of the Discount. The Discount will automatically apply at checkout.
(4) General Terms and Conditions:
The Discount cannot be used in conjunction with any other discounts, promotional offers and coupons (including but not limited to Theory VIP discounts/Theory VIP Birthday discounts, Credit Card Year-Round Discount and Theory CRM Coupons). The Discount cannot be transferred nor exchanged for cash or any other gifts or coupons. Theory reserves the right to amend these Terms and conditions without prior notice. Theory reserves the right of final decision in case of any dispute.
KELSO SPECIAL OFFER
(1) Promotional Period:
The Promotional Period is from 1 August 2026 to 11 October 2026 (both days inclusive).
(2) Designated Store in respect of this Promotion:
Theory Online Store at hk.theory.com, tw.theory.com, sg.theory.com and au.theory.com (collectively “Theory Online Stores”).
(3) How to enjoy this Promotion:
During the Promotional Period, all customers can enjoy 25% off (the “Discount”) upon the purchase of two regular-priced Kelso items in one single transaction at any Theory Online Stores. The discount applies to regular-priced items only, and does not apply to any other products.
The Discount will automatically apply at checkout.
(4) General Terms and Conditions:
This promotion only applies to regular-priced items, and does not apply to Bundles and discounted products. The Discount cannot be used in conjunction with any other discounts, promotional offers and coupons (including but not limited to Theory VIP discounts/Theory VIP Birthday discounts, Credit Card Year-Round Discount and Theory CRM Coupons). The Discount cannot be transferred nor exchanged for cash or any other gifts or coupons. This promotional offer cannot be used in conjunction with Theory staff discount. Theory reserves the right to amend these Terms and conditions without prior notice. Theory reserves the right of final decision in case of any dispute.
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