New Arrivals
Made for the cold that doesn’t mess around.
Merino base layers designed to be the most comfortable you'll own.
New Arrivals
Fall/Winter 2025
A collection of base layers made from our signature 100% merino wool fabric.
Made to withstand the fickle weather of Boston. Worn all across the country.
Available in limited quantities.
We use the gear we make. That's why every Simsek product comes with Lightning Guarantee.
Every product sold plants 5 trees, as part of our sustainability commitment.
Free Guide
Get our 100% free Ski Dress Guide!
A free guide for you to get ready for the day on the slopes! Deep dive on what to wear and how to choose those layers.
Perfect for beginners!
The Base Layer Edit
We asked: How can something this simple feel this refined?
For most people, a base layer is just a base layer. For us, it’s a design challenge — to perfect the foundation piece. Every seam, stitch, and fiber is considered.
Crafted from ultra-fine Australian Merino, it delivers exceptional softness, breathability, and durability — without sacrificing simplicity.
We believe true performance doesn’t have to be loud. It’s felt — in comfort that lasts, in details you don’t have to think about, and in the confidence of craftsmanship done right.
Our Mission
Born in and inspired by Boston
When our founder moved to Boston, his closet wasn't ready. Going out was intimidating.
Now we offer luxurious and adaptable clothing to help you get out there with confidence.