Meet Basewear

One underlayer for everything you do.

Yep, even swimming.

Join the movement of outdoor women have replaced all their swimsuits, undies, and sports bras with basewear.

Become a TK Supporter.

Get first access to our new Basewear, and support our grassroots company.

Free Shipping
Exchanges are Free and Easy.
Women Owned
Grassroots. Women + Gender Queer Run.
Your Perfect Fit
Guaranteed. It's our Mission.
Get the perfect fit, guaranteed. ✨Shipping & exchanges are on us.

Support Grassroots.

Tired of mass produced outdoor clothes that don't fit right from companies that are run by men and destroying the planet?

Yea, we are too.

Tera Kaia is a small, grassroots company that is 100% women lead and women + non gender conforming run. Every purchase helps us continue to create super comfortable underlayers designed by women, for anyone who wears a bra.

What's your Basewear Size?

Getting you into the perfect fit is our mission. In fact - we guarantee it.

Basewear Bra Size Calculator

Shop Basewear Tops

Basewear Bottoms Size Calculator

Your Measurements
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Join the movement of outdoor women who have left uncomfortable underlayers behind.

From mountain guides, to search and rescue teams: they’ve all switched to the perfect underlayer for the outdoors: Basewear.

Honestly, Basewear makes every day of my life better. I value comfort and utility in my clothing and these meet that criteria. Also, I feel like it really simplifies my packing for when I go on trips.
— Kaitie
Kayaking, swimming, hiking, fly fishing, running, backpacking, everything outdoors! I love that one piece of Basewear can be used for all activities.
— Sarah
I like the way my body looks in my Basewear so I wear it all the time. I feel confident when I wear it, whether on its own or under things. Plus, I love that I can wear my Basewear every day without washing, because I work outside and need something comfortable and breathable daily.
— Marilla
I literally live in these. I haven't worn another bra since I bought them. These are something I can wear all day without even remembering I have it on. For someone who takes in ALL details/senses at all times, this takes just one more thing out of that removing just one more layer of stress which is crucial in my ability to function in life.
— Jessica
I wear my basewear tops every day. Traditional bras, even sports bras, never worked for me. I like basewear because I finally have a comfortable bra that I can wear all day, every day.
— Ellen
I wear my Toura bra all the time. It is SO comfortable, not just for my back muscles but I am weirdly obsessed with the cut under the bust. Something about the curve up in the middle of my chest just makes it hug my body in the right places.
— Kailey

TK wouldn't be here without you.

From our wonderful customers and members, to the feedback that shapes our designs, Basewear wouldn't exist without you. We're grateful you're here.

❤️ Team TK