Every brand has a signature style, from Kowtow's Culottes and Classic Tee to Skall's Edgar Shirt. Find out more about these beloved bestsellers below.

Never one's to underestimate a classic, we started treen based on one founding principle: provide you all with sustainable, vegan upgrades to your well-worn wardrobe staples. 

Nearly three years on and we stand by this sartorial mission, and it appears you all feel the same. Our brands push the boundaries of innovation across design, from out-there outerwear to that statement dress you'll keep for special occasions, but it's their building block basics that stand the test of time.

We've backed our brands from the beginning and their season-less styles have now formed the cornerstones of our daily looks. From Kowtow's organic cotton core collection to Skall Studio's wear-with-anything shirting, there's plenty to get familiar with. After all, these fashion friends are here for the long run. Let's take a look at the always in style staples from our brands. Kowtow Classic Tee, Thinking Mu Rina Pants, HVISK Cayman Handbag, Wolf Circus Emeile Ring

Most versatile piece in your wardrobe award will always go to the humble white tee. We reach for one more times than not; as a vital layer in the cooler months, a staple top in the warmer ones and a way to dress down a smart blazer or patterned skirt. Easy to work into everything you already wear. But hands up easy to overlook when it comes to investing in this staple. 

Our pick to upgrade your t-shirt drawer? The Classic Tee from Kowtow. The perfect, slightly-oversized-but-not-drowning-you cut in a thick organic cotton. Wear with relaxed tailoring, a simple sneaker and a flash of gold jewellery.

Nudie Jeans Jenny Cable Knit, Kowtow Racer Back Singlet, Kowtow Culottes, HVISK Zipper Wallet, Wolf Circus Organic Hoops

We'll admit, it's an obvious solution, but when it comes to fashion foundations there's arguably nothing more hardworking than your monochromatic pieces. These classics will forever be ready to pair up with their wardrobe siblings and work in each season. If in doubt, go for shades of black and white. A smart and simple confidence boost, suitable for every occasion. 

This season the bestselling Kowtow Culottes are back as a twist on your tailoring (Editor's note: these are supremely comfortable!) and work a treat with knitwear now and a tank top later. Add a finishing touch of simple gold hoops and forgo a bag for a vegan wallet.

Skall Studio Painter Pants, Skall Studio  Edgar Shirt, Wolf Circus Camden Necklace, Clae Runyon Sneakers

And the final tip in our trifecta of always in style looks? The new neutrals. We know we just said that a monochrome mood is always a winner, but if you'd rather add a hint of colour into your day then this modern palette of sage green, dark moss grey and deep khaki green might persuade you to freshen up your staples. Keep it tonal with complementary colours inspired by nature.

This season we'll be turning to our organic cotton shirting from Skall in a new hue, along with the brand's now infamous trousers for a soft day-to-night style. Add in a chunky gold chain into the look (another forever piece through the decades) and a sleek vegan crossbody bag.

Want more sustainable staples? Take a closer look at the new regulars in our wardrobes right here.