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Limited-Time Summer Offer| Shop summer-ready styles at can't-miss prices*. SHOP WOMEN SHOP MEN T&C apply

New Markdown Added | Close out the season with styles at can't-miss prices. SHOP WOMEN SHOP MEN

Buy More, Save More | Purchase two on-sale styles to enjoy extra savings. SHOP WOMEN SHOP MEN

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Women's T-Shirts + Tanks

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Quick Add

Tiny Tee in Organic Cotton

null ~~Price reduced from to~~ NT$ 3,300

Purchase 2 Pieces to Unlock Bundle Price

Quick Add

Sweater Tee in Regal Wool

null ~~Price reduced from to~~ NT$ 7,250

Limited-Time Summer Offer

Quick Add

Tiny Tee in Organic Cotton

null ~~Price reduced from to~~ NT$ 3,300

Purchase 2 Pieces to Unlock Bundle Price

Exclusive Color

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Tiny Tee in Organic Cotton

null ~~Price reduced from to~~ NT$ 3,300

Purchase 2 Pieces to Unlock Bundle Price

Quick Add

V-Neck Tank Top in Soft Rib

null ~~Price reduced from to~~ NT$ 5,250

Limited-Time Summer Offer

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V-Neck Tank Top in Soft Rib

null ~~Price reduced from to~~ NT$ 5,250

Limited-Time Summer Offer

Shrunken Crewneck Tee in Ribbed Cotton-Blend

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Shrunken Crewneck Tee in Ribbed Cotton-Blend

null ~~Price reduced from to~~ NT$ 5,250

Limited-Time Summer Offer

Quick Add

Shrunken Crewneck Tee in Ribbed Cotton-Blend

null ~~Price reduced from to~~ NT$ 5,250

Limited-Time Summer Offer

Quick Add

Sweater Tee in Regal Wool

null ~~Price reduced from to~~ NT$ 7,250

Quick Add

Sweater Tee in Regal Wool

null ~~Price reduced from to~~ NT$ 7,250

Quick Add

Sweater Tee in Regal Wool

null ~~Price reduced from to~~ NT$ 7,250

Quick Add

Tiny Tee in Organic Cotton

null ~~Price reduced from to~~ NT$ 3,300

Purchase 2 Pieces to Unlock Bundle Price

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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 Theory Project products, Bundles and permanent/core items (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.

FINAL SALE BUY MORE SAVE MORE OFFER
(1) Promotional Period: The Promotional Period is from 26 June, 2026 to 26 July, 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 an extra 10% discount (the “Discount ”) on discounted items (to be selected/designated by Theory at its discretion) (the “Discounted Items”) upon the purchase of two discounted items (the “Purchase Threshold”), in one single transaction at any Theory Online Stores. The Discount will automatically apply at checkout. (4) General Terms and Conditions: The Discount only applies to the Discounted Items. Discount cannot be used in conjunction with any other discounts, promotional offers and ts/Theory VIP Birthday discounts, shopping mall loyalty program 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. No exchange or return would be provided for products purchased with the Discount under this promotion. 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.

LIMITED-TIME SUMMER OFFER
(1) Promotional Period: The Promotional Period is from 1 July 2026 to 12 July 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 15% discount upon any purchase on regular priced items (excluding the Excluded Products as defined below) (the “Discount”) in one single transaction at any Theory Online Stores. The Discount will automatically apply at checkout. (4) General Terms and Conditions: The Discount does not apply to Bundles items, permanent/core and discounted products (the “Excluded Products”). Save and except shopping mall coupons and designated “Gift With Purchase” offers designated by Theory from time to time, 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, shopping mall loyalty program 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. No exchange or return would be provided for products purchased with the Discount under this promotion. 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.