A white drawstring bag printed with 'MYSTERY BAG' in bold black letters, styled in a flat lay with black leggings, a dusty pink sports bra, matching shorts, a water bottle, a smartphone, and earbuds on a white marble surface.

Activewear Mystery Bag – Leggings, Shorts or Tops

2-Pack / Leggings / S
$19.95 $59.99
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A white drawstring bag printed with 'MYSTERY BAG' in bold black letters, styled in a flat lay with black leggings, a dusty pink sports bra, matching shorts, a water bottle, a smartphone, and earbuds on a white marble surface.
  • A white drawstring bag printed with 'MYSTERY BAG' in bold black letters, styled in a flat lay with black leggings, a dusty pink sports bra, matching shorts, a water bottle, a smartphone, and earbuds on a white marble surface.
  • activewear-mystery-box-leggings-shorts-bras
  • Person taking a selfie outdoors with a scenic background
  • A promotional graphic for a 'Mystery Bag Collection' featuring black silhouette icons of various women's apparel items (sports bra, tank top, shorts, leggings, t-shirt, pants) arranged around a central open box with a gold question mark on a light gray background.
  • A woman takes a mirror selfie in a bedroom, wearing a dark slate blue athletic two-piece set consisting of a sports bra and high-waisted shorts, paired with white crew socks.
  • A woman walking on an outdoor road wearing a bright pink activewear set consisting of a long-sleeve crop top, matching high-waisted leggings, and a white baseball cap.
  • A woman takes a mirror selfie in a gym, wearing a matching burgundy sports bra and high-waisted leggings, white socks, and white sneakers.
  • Black leggings, pink shorts, and pink sports bra on a light blue background
  • List of reasons to choose a mystery bag on a light gray background
  • Bright pink high-waisted biker shorts shown on a model, with the model's hand pulling the elastic waistband to demonstrate stretch. The background is a textured off-white wall.
  • Woman wearing black athletic leggings and sports bra on a light gray background
  • A woman takes a mirror selfie in a gym while wearing a matching sage green sports bra and high-waisted leggings set, paired with white sneakers.
  • A plus-size woman posing outdoors under a wooden patio canopy, wearing a beige long-sleeve zip-up bodysuit with a keyhole neckline and dark brown leggings.
Activewear Mystery Bag – Leggings, Shorts or Tops

Activewear Mystery Bag – Leggings, Shorts or Tops

$19.95 $59.99

Only a few left at this price — sizes go fast.
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4.8 / 5 · 600+ reviews
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Your New Gym Outfit
From $19.95

US-Based  •  1,000+ Happy Gym Girls  •  30-Day Guarantee

You deserve to look good at the gym without overpaying for it. Pick your style, your size, and we'll send you 2 or 3 bestselling pieces you'll actually reach for every morning.

Pick Your Favorite

Choose Leggings, Shorts or Sports Bras. Curated to Your Size. From just $19.95.

Pick your style. We surprise you with the rest.
⭐ 4.8 Rated
🚚 Free Shipping
✓ No Duplicates
★★★★★

"Everything fit perfect. Way better than I expected. I felt so good wearing it."

— Jasmine R., Size S · Leggings

★★★★★

"The shorts are soft and the fit is actually true to size. Already ordered again."

— Mia T., Size M · Shorts

Gym Girls, Fit Check.

Real pieces. Real fits. No guessing.

2-Pack Pull
Customer Fit
Leggings Drop
Shorts Set

Every Bag Is Different

New surprise every order.

Walk in confident, every time

Viral styles that hug right, move right, and make you feel like you showed up.

No more “what do I wear” mornings

Matching pieces, ready to go. Your gym bag will thank you.

Treat yourself — without the guilt

$60+ worth of premium activewear for a fraction of the price. You earned it.

A new surprise, every order

No repeats. Every bag is different. That unboxing feeling never gets old.

🛡️ Our Promise to You

Not obsessed with your bag? We’ll make it right. Reach out within 30 days and we’ll exchange or refund. We’ve shipped 1,000+ bags and we stand behind every one.

🎁 What’s Inside? +

Every bag is packed with 2 or 3 bestselling activewear pieces from the category you choose — no duplicates.

  • Leggings — High-waist, four-way stretch, squat-proof. The kind you wear on repeat.
  • Shorts — Biker or athletic cut, buttery-soft fabric, moves with you.
  • Sports Bras — Medium support, adjustable, flattering on every body.

Fabrics are soft, stretchy, and breathable, true-to-size fits with four-way stretch. Each piece is a verified bestseller from our activewear bundle collection.

📏 Size Guide +
Size US Size Bust (in) Waist (in) Hip (in)
XS 0–2 30–32 23–25 33–35
S 2–4 32–34 25–27 35–37
M 6–8 34–36 27–29 37–39
L 8–10 36–38 29–31 39–41
XL 12–14 38–40 31–33 41–43

Model is 5’7” wearing a size S. Between sizes? We recommend sizing up for the most comfortable fit through the hips.

🚚 Shipping & Delivery +
  • Free shipping on all US orders (over $49)
  • Processing time: 1–2 business days
  • Delivery: 5–8 business days (standard)
  • Tracking included with every order

You’ll receive a tracking email as soon as your activewear bag ships.

Your Next Gym Outfit. Starts at $19.95

Best Sellers  •  Free Shipping  •  Save Up to 67%

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