Waist – Measure your natural waistline at or just above your belly button.
Hip – Measure around the fullest part of your hips and buttocks.
Inseam – Measure from the crotch seam down to the bottom of the leg opening.
Bust & Underbust
Bust – Measure under your arms and around the fullest part of your chest. Keep the tape level and snug, but not tight.
Underbust – Measure directly under your bust around your ribcage. Keep the tape level and snug, but not tight.
Length & Torso
Length – Measure the distance from the base of your neck down to the hemline.
Shoulder – Measure from shoulder seam to shoulder seam across the back.
Chest – Measure across the chest 1 inch below the armholes.
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Free Returns
Boss Flex is made for your movement. With Power Mesh for compression comfort and light, sweat-wicking fabric, this racerback bra is perfect for athletes.
Our most supportive bra yet
Perfect for any athletic activity
Sweat-wicking, sleek and smooth active knit fabric
Maximum comfort. No cups or underwire. Tag-free care label on back.
Smooth finish. No chafing or visible seams at neck and arm openings.
Woven jacquard elastic underband holds shape and color
Classic racerback style with scooped neckline
Reflective logo on front
True to size
Designed for a close fit
A sport bra built from recycled fabric, with Power Mesh compression and sweat-wicking performance — for running, HIIT, and any athletic activity where you need support without restriction.
Power Mesh compression panels — targeted support where you need it; breathable and cooling
Recycled poly fabric — lightweight, sweat-wicking, quick-dry active knit
No underwire, no cups — structure comes from compression, not rigid hardware
Anti-chafe internal seam construction — nothing rubs against skin during movement
Sweat-wicking and quick-dry — pulls moisture away from skin during cardio
Breathable mesh panels — ventilation where you run hottest
Supportive without restrictive — medium compression; comfortable for running and daily wear
Matching Flex underwear available — complete active set
Flex Active
88% RECYCLED POLYESTER, 12% ELASTANE
Knit from OEKO-TEX certified recycled polyester and spandex, Flex fabric is for athletes who need freedom of movement. Extremely lightweight and sweat-wicking, it feels silky smooth and friction-free under clothing. With a medium compressive fit, Flex fabric is here to empower your best performance.
Softness
Weight
Stretch
Breathability
Softness
Weight
Stretch
Breathability
88% RECYCLED POLYESTER, 12% ELASTANE
Knit from OEKO-TEX certified recycled polyester and spandex, Flex fabric is for athletes who need freedom of movement. Extremely lightweight and sweat-wicking, it feels silky smooth and friction-free under clothing. With a medium compressive fit, Flex fabric is here to empower your best performance.
Machine wash cold
tumble dry low
OEKO-TEX® Certified
Enhanced support
Signature no-dig waistband
Breathable
OEKO-TEX® Certified
Boss Flex is designed for your movement. Featuring Power Mesh for compression comfort and lightweight, sweat-wicking recycled fabric, this sport bra is perfect for athletes.
• Sport bra made with recycled material
• Perfect for any athletic activity
• Sweat-wicking, sleek and smooth active knit fabric
• Maximum comfort. No cups or underwire
• Tag-free care label on back
• No chafing or visible seams at neck and arm openings
• Woven jacquard elastic underband
• Classic racerback style with scooped neckline
• Reflective logo on front
Boss Flex is made for your movement. With Power Mesh for compression comfort and light, sweat-wicking fabric, this racerback bra is perfect for athletes.
Our most supportive bra yet
Perfect for any athletic activity
Sweat-wicking, sleek and smooth active knit fabric
Maximum comfort. No cups or underwire. Tag-free care label on back.
Smooth finish. No chafing or visible seams at neck and arm openings.
Woven jacquard elastic underband holds shape and color
Boss Flex is made for your movement. With Power Mesh for compression comfort and light, sweat-wicking fabric, this racerback bra is perfect for athletes.
Our most supportive bra yet
Perfect for any athletic activity
Sweat-wicking, sleek and smooth active knit fabric
Maximum comfort. No cups or underwire. Tag-free care label on back.
Smooth finish. No chafing or visible seams at neck and arm openings.
Woven jacquard elastic underband holds shape and color
Classic racerback style with scooped neckline
Reflective logo on front
True to size
Designed for a close fit
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