Flexvibe high waisted shapewear in Core Color, tummy control main product image for yoga, gym, commute, and daily

Flexvibe High-Waist Sauna Sweat Pants | Heat-Locking, Tummy Control, Cropped & Knee-Length, 2 Colors, S–3XL

Name: Flexvibe High-Waist Sauna Sweat Pants | Heat-Locking, Tummy Control, Cropped & Knee-Length, 2 Colors, S–3XL
Rating: 4.92 (13 reviews)

Smooth shapewear layering with a gently held-in feel under dresses, workwear, and everyday outfits.

$23.00

$23.00 $33.00

Buy 2 get 10% off - code FV10

ColorBlue

Type Cropped Pants Knee-Length Pants

Size S M L XL 2XL 3XL

Find your fit

Size Guide

All measurements are body measurements in inches. If you are between sizes, choose the larger size for a more relaxed feel or the smaller size for a more held-in fit.

Maternity & Postpartum

Size	US	Bust	Under-bump Waist	Hip
S	4-6	34-36	29-31	36-38
M	8-10	37-39	32-34	39-41
L	12-14	40-42	35-38	42-45
XL	16	43-45	39-42	46-49
XXL	18	46-48	43-46	50-53

Start with your pre-pregnancy size, then size up when you want more room through the bump, belly, or hips.

Flexvibe High-Waist Sauna Sweat Pants | Heat-Locking, Tummy Control, Cropped & Knee-Length, 2 Colors, S–3XL

How To Measure

Measurements should be taken directly on your body.

Bust: Measure around the fullest part of your bust, keeping the tape level.

Under-bump Waist: Measure around the lower belly where maternity waistbands usually sit.

Hips: With feet together, measure around the widest part of your hips.

See more on our Size Guide.

Free Shipping over $30

30-Day Returns

The Flexvibe High-Waist Sauna Sweat Pants are dual-layer, heat-locking sauna pants with a high-waist 3-row hook closure, tummy control, and butt lifting — available in Cropped Pants and Knee-Length Pants styles, and in Blue (PU inner) and Silver (silver-coated inner) colorways for different heat-retention preferences. The outer layer is 92% Polyester + 8% Spandex for breathability and flexibility, while the inner Polyurethane layer locks in heat to maximize sweat output during gym workouts. Available S–3XL.

Quick Fit Snapshot

Best for gym workouts, sauna sessions, and sweat-enhancing training
Outer layer 92% Polyester + 8% Spandex — breathable, flexible
Inner layer Polyurethane (PU) or Silver coating — heat-locking
Lengths Cropped Pants & Knee-Length Pants
Sizes S, M, L, XL, 2XL, 3XL · Blue, Silver

Sauna PantsSweat-InducingGymHeat-LockingTummy ControlTwo Lengths

✓ Dual-layer heat-locking✓ High-waist tummy control✓ Cropped & knee-length options✓ 3-row hook secure closure

Product Features

Dual-Layer Heat-Locking Construction

Outer layer: 92% Polyester + 8% Spandex — breathable, flexible outer shell for comfortable gym wear
Inner layer: Polyurethane (PU) or Silver coating — locks in body heat to maximize sweat output during workouts
High-waist 3-row hook closure — secure, adjustable fit that stays in place during exercise
Tummy control — gentle abdominal compression for a more sculpted appearance during workouts

Two Lengths & Two Inner Coatings

Cropped Pants — above-knee length for maximum mobility during high-intensity workouts
Knee-Length Pants — extended coverage for additional thigh warmth and sweat enhancement
Blue (PU inner) — standard heat-locking polyurethane inner layer
Silver (silver-coated inner) — reflective silver coating for enhanced heat retention
Butt lifting — enhances the glutes for a flattering gym silhouette

Size Guide

Available in S, M, L, XL, 2XL, 3XL. True to size. Size up if between sizes.
View Full Size Guide →

Care Instructions

Machine wash cold on gentle cycle
Do not bleach
Hang or lay flat to dry — do not tumble dry
Do not iron the PU or silver inner layer

FAQ

What is the difference between PU and silver-coated sauna pants?

PU (polyurethane) sauna pants use a polyurethane inner layer that traps body heat through insulation. Silver-coated sauna pants use a reflective silver inner coating that reflects body heat back toward the skin, providing an additional heat-retention mechanism. Both options effectively increase sweat output during workouts, with the silver coating potentially providing slightly enhanced heat reflection for more intense sweat sessions.

Which length is better for gym workouts — cropped or knee-length sauna pants?

Cropped sauna pants provide more freedom of movement for high-intensity workouts like HIIT, cycling, and squats, while knee-length pants provide additional thigh coverage and warmth for lower-intensity workouts and walking. Choose cropped for maximum mobility and knee-length for more comprehensive thigh sweat enhancement. Both lengths provide the same tummy control and butt-lifting benefits.

How do I care for sauna sweat pants with a PU or silver inner layer?

Machine wash cold on a gentle cycle and hang or lay flat to dry. Avoid tumble drying, as high heat can damage the PU or silver inner layer and reduce its heat-retention effectiveness. Do not iron the inner layer. Rinse promptly after workouts to prevent sweat buildup from degrading the inner coating over time.

Shipping
Free standard shipping on orders over $30. Most orders process in 1-2 business days and arrive in 7-10 business days.

Returns
Return unworn, unwashed items with tags and original packaging within 30 days.

Fit Snapshot

Smoothing fit & size

Shapewear fit notes for visual smoothing, coverage, comfort, and measurement-based sizing.

Fit & size

Do not size down. Use real waist, hip, bust, and torso measurements so the piece can smooth without rolling or digging.

Fabric & coverage

Review the product description and photos for fabric composition, stretch, lining, padding, pockets, opacity, and care. For lighter colors, check photo coverage before choosing underwear color.

Before checkout

Confirm the Size Guide, shipping timing, and return policy. Flexvibe describes fit, support, and visual smoothing only; we do not promise weight loss, body changes, or medical results.

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