The Classic Sustainable Tee
The Classic Sustainable Tee - Onesta UK - #ethical_Clothes#
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The Classic Sustainable Tee

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The Onesta Classic Tee is made with luxuriously soft Tencel fabric. Designed for a casual, relaxed fit with a flattering drape. Wear yours over trousers, tucked into shorts, or even tied for a relaxed style. 

Life is too short to live without the The Classic Sustainable Tee. Be happy. Be Content. Be Satisfied.

Inventory Last Updated: Feb 25, 2024
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66% TENCEL™ Lyocell,

28% organic cotton, 6% spandex


Threads - 100% recycled polyester

Trims - 100% organic cotton


Oeko-Tex® Standard 100

Made from GOTS Certified organic cotton yarn

Fit & Sizing

The Classic Tee is designed to be classic fitting - not too tight, not too loose. Size up if you prefer a looser fit, and down for a tighter fitting t-shirt. Our model is 5'7" and is wearing a size medium. For more information, please see our Sizing section and size chart.

The best way to choose your size is to use our size chart (in the product images) and your body measurements. However, if you are in a rush, we’ve also provided equivalent dress sizes in the chart so you can easily choose your size without measuring.

Please note that these measurements are guidelines only. We are happy to help you find your perfect size - please email us at

Care Instruction

Hand or machine wash cool with similar colours, hang to dry, iron low temperature. We recommend using an earth friendly, non-bio detergent and not tumble drying. Please see our 'Care for your clothing' section for more information on why.

Delivery Instructions

Standard delivery
3–5 days for UK delivery Monday to Saturday, £4.75

For international delivery, please see HERE

We hope you are happy with your order but if for some reason you are not completely satisfied, we accept returns within 14 days after receipt of goods.


Our model is wearing The Neli - Mom jean by Hiut Denim Co, based in Cardigan Wales. These are micro-plastic free, biodegradable stretch jeans and super comfy! And wearing the Cordones Indio Sneaker from TOMS’ vegan collection. We love collaborating with like-minded brands especially Hiut Denim Co and TOMS who share our values in creating positive change to improve lives and conserve our earth for a better tomorrow.


Drop us an email with the product name and size you are looking for, and we will see if we can make one specially for you!