If your chest and underbust measurements fall across two sizes, consider your compression needs. For a firmer fit or high-output training, size down. For all-day comfort or ease of wear, size up. Still unsure? Start with the larger size — exchanges are free (U.S. only).

Secure. Flattening. Breathable. A proper fit won’t crush your ribs or cut into your underarms. You should feel supported but mobile — able to breathe deeply, move freely, and wear confidently throughout the day.

If it feels tough to get on at first, you’re not doing anything wrong — and it likely doesn’t mean the binder is too small.

TerraNova X™ uses a hook-and-eye closure at the bottom band to give you better control over fit and support. But if you’re used to pullovers or velcro designs, the motion might feel unfamiliar — especially if you're not used to reaching behind your body.

Remember the first time you put on a pullover binder? You probably struggled — most of us did. But over time, it got easier. Same here. With each wear, the action becomes smoother, your body adapts, and the fit becomes second nature.

If it feels secure, breathable, and supportive once it’s on, you're likely in the right size. Give it a few wears — comfort grows with repetition.

Everyone’s sensory profile is different. TerraNova X™ is built for body neutrality — flat seams, soft lining, and gentle structure. If tightness is uncomfortable or triggering, start with short wears at home and build from there. Comfort is personal — honor yours.

TerraNova X™ is engineered for motion — and built with intention in every detail. Instead of using velcro or a pullover design, we chose a flat hook-and-eye closure at the hem to deliver a more secure, adjustable fit that’s custom to you.

The underband features four levels of adjustability — not by accident, but by design. We wanted to give you control over how the garment fits and supports your body on any given day. Whether you're seeking a snug fit for high-impact training or a looser feel for daily wear, the adjustment range lets you dial it in.

We know this style of closure might be new to some — especially if you're used to stretch-and-go sports bras or binders. Hooking it at the back can feel awkward at first, but most wearers find it becomes second nature after a few wears — like muscle memory. Give it time, and the ease will follow.

We made this choice for three key reasons:

1. Personalized support – adjust the underband to match your needs
2. Reliability – hook-and-eye hardware is durable and won’t loosen like velcro
3. Low-profile finish – our flat-lay closure stays nearly invisible under clothes

Once it's on, TerraNova X™ delivers what it’s made for — locked-in support, unrestricted movement, and all-day wear that doesn’t quit.

Supportive but not restrictive. TerraNova X™ was tested under rigorous movement — running, lifting, climbing, sparring, and team sports — to deliver containment without collapse. Expect a locked-in feel that moves with you.