According to Running Bare themselves!
"Luxurious, chic and consciously crafted, the Saint Muscle activewear tee is heaven-sent. Constructed with sustainably produced, biodegradable Seacell, an innovative eco-fibre made from recycled plastic bottles and seaweed rich in nutrients and minerals to detox and purify the skin. With a supple handle which elegantly drapes the body and classic styling, this tee teams with your favourite leggings or sweat for any workout from bootcamp to barre or brunch.
70% recycled polyester / 24% seacell / 6% elastane. A sustainable, biodegradable, eco-friendly fabric made with a mix of Icelandic seaweed and recycled clear plastic water bottles.
One of the comfiest workout tops you've ever worn; it's breathable, light and soft on the skin. And, thanks to the seaweed, it will also detoxify the skin, and slow down the ageing process as you wear it. No joke.
Wear it to:
Any workout you have planned, because it has the ability to absorb sweat faster than cotton, but it really loves yoga and Pilates the most."