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Limited Time Sweater Offer | Purchase 2+ selected sweater items get extra offer* SHOP WOMEN SHOP MEN T&C apply.

Shop 2+ Selected Motion Wool suiting items get extra offer* SHOP NOW T&C apply

Welcome Offer | Subscribed to enjoy special offer on your first full-price purchase. T&C apply.

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Men's Bestsellers

Theory is known for our timeless essentials. Discover everything you need to complete your wardrobe, from work to weekend.

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Mayer Trousers in Stretch Wool

null ~~Price reduced from to~~ AU$ 435.00

Quick Add

Ryder Tee in Relay Jersey

null ~~Price reduced from to~~ AU$ 230.00

Purchase 3 Pieces to Unlock Bundle Price

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Ryder Tee in Relay Jersey

null ~~Price reduced from to~~ AU$ 230.00

Purchase 3 Pieces to Unlock Bundle Price

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Sylvain Shirt in Structure Knit

null ~~Price reduced from to~~ AU$ 360.00

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Crewneck Sweater in Regal Wool

null ~~Price reduced from to~~ AU$ 385.00

Limited Time Offer - Buy 2 Get 15% Off | Buy 3+ Get 20% Off

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Sylvain Shirt in Structure Knit

null ~~Price reduced from to~~ AU$ 360.00

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Clinton Blazer in Precision Ponte

null ~~Price reduced from to~~ AU$ 770.00

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Sylvain Shirt in Structure Knit

null ~~Price reduced from to~~ AU$ 360.00

Raffi 5-Pocket Trousers in Neoteric Twill

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Raffi 5-Pocket Trousers in Neoteric Twill

null ~~Price reduced from to~~ AU$ 360.00

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Precise Tee in Cotton Jersey

null ~~Price reduced from to~~ AU$ 150.00

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Sylvain Shirt in Structure Knit

null ~~Price reduced from to~~ AU$ 360.00

Quick Add

Crewneck Sweater in Regal Wool

null ~~Price reduced from to~~ AU$ 385.00

Limited Time Offer - Buy 2 Get 15% Off | Buy 3+ Get 20% Off

Join our mailing list for our latest updates and enjoy 15% off your first full price order. Learn more about our privacy policy here.

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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.

MOTION WOOL SUITING OFFER
(1) Promotional Period: The Promotional Period is from 12 October 2026 to 8 November 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 a 20% discount (the “Discount”) upon the purchase of at least two selected Motion Wool suiting items (the “Eligible Items”) in a single transaction at any Theory Online Stores. The Discount will automatically apply at checkout. (4) General Terms and Conditions: The Discount applies only to the Eligible Items and does not apply to any other items, Bundles, Core or discounted products. Save and except the shopping mall coupons and designated “Gift With Purchase” offers, the Discount cannot be used in conjunction with any other discounts, promotional offers or coupons, including but not limited to Theory VIP discounts, Theory VIP Birthday discounts, shopping mall loyalty program discounts, Credit Card Year-Round Discounts and Theory CRM Coupons. The Discount cannot be transferred or exchanged for cash, gifts or coupons. No exchange or return will be provided for products purchased with the Discount under this Promotion. Theory reserves the right to amend these Terms and Conditions without prior notice. In case of any dispute, Theory reserves the right of final decision.

SWEATER OFFER
(1) Promotional Period: The Promotional Period is from 16 October 2026 to 25 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 the following discounts on selected sweater items (the “Eligible Items”) in one single transaction at any Theory Online Stores: • Purchase any two Eligible Items to enjoy a 15% discount; or • Purchase any three or more Eligible Items to enjoy a 20% discount. The applicable discount (the “Discount”) will automatically apply at checkout. For the avoidance of doubt, the purchase of a set of Sweater Bundles shall be counted as the purchase of one item only within the Purchase Threshold, but the Discount shall not apply to the Sweater Bundles. (4) General Terms and Conditions: The Discount applies only to the Eligible Items and does not apply to Bundles, discounted items or any other items. Save and except designated cash rebate offers, shopping mall coupons and designated “Gift With Purchase” offers, the Discount cannot be used in conjunction with any other discounts, promotional offers or coupons, including but not limited to Theory VIP discounts, Theory VIP Birthday discounts, shopping mall loyalty programme discounts, Credit Card Year-Round Discounts and Theory CRM Coupons. No exchange or return will be provided for products purchased with the Discount under this Promotion. Theory reserves the right to amend these Terms and Conditions without prior notice. In case of any dispute, Theory reserves the right of final decision.