Oss in the Membrane

Bring a little mat obsession into your everyday wear with the Oss Life Oss in the Membrane Tee — a fun, BJJ-inspired design made for those who always have jiu jitsu on the brain.

Featuring a pink anatomical brain with different areas labeled with BJJ-inspired terms, this shirt puts a grappling twist on the classic “Insane in the Membrane” phrase. With its slightly retro feel and unmistakable jiu jitsu personality, it’s an easy way to represent the sport without taking things too seriously.

Why You'll Love It

• Premium Feel: Soft, breathable fabric that holds its shape wear after wear
• Athletic Fit: Designed to complement your build without feeling restrictive
• Statement Design: Anatomical brain graphic packed with BJJ personality and a playful nod to life on the mats
• Versatile Style: Available in Black, Grey, and Team Navy for an easy match with gym gear, jeans, or everyday fits

Built for the Oss Life

This isn't just a shirt—it's a mindset. "Oss" represents respect, discipline, and consistency. Whether you're on the mats, in the gym, or grinding through your day, this tee is a reminder to stay sharp and keep showing up.

Product Details

• Unisex Fit
• Lightweight and breathable
• True to size

Sizing Tip

For a more fitted look, order true to size. For a relaxed fit, size up.

Care Instructions

• Machine wash cold, inside out
• Tumble dry low or hang dry
• Do not iron directly on the design