Products, Sizing & Care
Find your perfect fit, explore our fabrics, and learn how to keep your Knobby Undies looking (and feeling) fresh. Everything you need to know about BottleBlend™, Naturals, care tips, and size guides.
How do I find my perfect size?
Getting the perfect fit is easy and super important for keeping things comfy where it counts. You can view all sizing info in our Size Guide, including men’s, women’s, and kids’ fits. Each guide shows the measurements for waist, hips, and chest (wher
Can I choose the design?
It depends! If you’re part of The Undie Club, the answer is no - and that’s all part of the fun. Each month’s underwear drop is a surprise design, created exclusively for Club members. You’ll find past favourites archived in the Design Museum, but ev
I'm the nervous type. Can I try a pair first?
You don’t have to test the waters; our Love Them Guarantee has you covered. We stand by the quality of everything we make. If your first pair isn’t the perfect fit, feel, or style, we’ll replace it or refund you in full, even if you’ve opened and tri
BottleBlend™ vs Naturals - what’s the difference?
Both BottleBlend™ and Naturals are premium, sustainable fabrics - each with its own personality and feel. Made from recycled plastic bottles (certified post-consumer waste). Lightweight, breathable pin-hole construction that’s quick drying and comfor
What’s the difference between The Club and The Shop?
The Undie Club. The Shop. What it is. Monthly underwear subscription. One-time purchases. Designs. Surprise, limited-edition styles. Choose your own. Fabrics. BottleBlend™ or Naturals. BottleBlend™, Naturals, and seasonal options. Price. $25 per mont
How should I care for my Knobby undies?
Caring for your Knobbys keeps them comfy, vibrant, and long-lasting. Washing:. Use a cold, gentle cycle, and turn them inside out. Avoid bleach, harsh detergents, or fabric softeners - they can break down elastics and prints. Drying:. Line dry in the
Can I work out or swim in my Knobbys?
Workouts:. Absolutely - BottleBlend™ is designed for movement. It’s breathable, lightweight, and quick drying, making it perfect for training, running, or active days. Swimming:. Knobbys are not designed as swimwear. While BottleBlend can handle an o
Mystery Packs vs Greatest Hits Packs - what’s the difference?
Short answer: Both packs are great value. The difference comes down to choice vs surprise. Here’s the clear breakdown 👇. Best for: Customers who want certainty and fan-favourite designs. What they are: Greatest Hits Packs feature a curated selection