Triathlon Backpack
Made for the female body in motion.
Endurance wear designed around female athletes — drafted from the way a woman's body moves through swim, bike, and run, finished in original hand-drawn prints by founder Liz Tremain. Here's how to find your size.
Three measurements. One soft tape.
Wear thin clothing or measure over a sports bra and shorts. Pull the tape snug — not tight. Measure twice if a number feels off.
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01 — Bust
Around the fullest part of your chest.
Tape level all the way around. Arms relaxed at your sides, not lifted.
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02 — Waist
Your natural waist — the narrowest point.
Roughly an inch above your belly button. Stand normally; don't suck in.
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03 — Hip
The fullest part of your hips and seat.
Stand with feet together. Tape parallel to the floor, usually 7–9 inches below your waist.
The size chart.
These are body measurements — not garment measurements. Match your body to the row.
| Size | Bust | Waist | Hip |
|---|---|---|---|
| XXS | 66-71 | 56-61 | 71-76 |
| XS | 71-76 | 61-66 | 76-81 |
| S | 74-81 | 64-71 | 79-86 |
| M | 79-86 | 69-76 | 84-91 |
| L | 84-91 | 74-81 | 89-97 |
| XL | 89-97 | 79-86 | 94-102 |
| XXL | 94-102 | 84-91 | 99-107 |
These body measurements work across our cycling, triathlon, run, and lifestyle apparel. Tri suits and swimwear include chamois and cut-specific guidance on each product page.
Size up.
Our gear fits true to size. If you're between two sizes, we recommend sizing up for a more comfortable fit. Returns are 30 days, and your first exchange ships both ways on us.
Send us your numbers.
Email contact@rebelwaks.com with your bust, waist, and the piece you're sizing for. We'll come back to you with a recommendation. We've all been the person measuring ourselves at the kitchen counter at 10pm. We can save you the return.
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The full kit
A transition bag designed around the specific kit demands of triathlon. Dedicated compartments for swim, bike, and run gear so you're not fishing through a single main pocket at 5am. Waterproof lining keeps valuables dry, wet-dry separation means your damp swim gear stays away from everything else, and the durable construction handles the weight of a full race kit. Designed as part of the Rebel accessories range — functional, purposeful, and built to the same standard as the rest of the collection.
Drafted for women, not adapted from men's. Every pattern is built from the ground up for the female body in motion — across swim, bike, and run.
True to size for most. Stay true for sprint and Olympic distances. Between sizes and racing 70.3 or full Ironman? Size up — long-course comfort beats compression every time.
Tri suits and swim cuts run snug on purpose. That's the compression and the hydrodynamics doing their job. Run and lifestyle pieces have a touch more ease.
Free shipping on every order, domestic and international. No minimum. Orders ship within 1–3 business days; standard domestic delivery is 5–7 business days from shipment, international is typically 10–14 business days.
30-day returns on unworn, unwashed items with original tags. Prepaid return label on request — email hello@rebelwaks.com. First exchange ships both ways on us.