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Superfeet Flex Insoles

Product Option

Size B, (Women 4.5 - 6/ Kids 2.5 - 4)

SKU FL143300-B
$34.99 Pair

Size D, (Women 8.5 - 10/ Men 7.5 - 9)

SKU FL143300-D
$34.99 Pair

Size E, (Women 10.5 - 12/ Men 9.5 - 11)

SKU FL143300-E
$34.99 Pair

Size F, (Women 12.5 - 14/ Men 11.5 - 13)

SKU FL143300-F
$34.99 Pair
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Superfeet FlexMax Insoles are designed for a wide range of activities including working out, running, and everyday use to provide additional support without being super rigid. These insoles have a high-volume design providing maximum support and ideal for roomy footwear. FlexMax Insoles feature doctor-recommended Superfeet shape, special flex design hugs the user’s feet, and cradles heels. Its durable 4mm thick Aerospring comfort foam delivers heel-to-toe comfort, while the flexible heel cradle provides structure and stability, reducing stress on feet, ankles, and knees. FlexMax Inserts fit best in athletic footwear.

Superfeet Flex Shoe Insoles Benefits

  • Durable Construction
  • Aerospring Comfort Foam
  • Moisturewick
  • Dynamic Shape
  • Ventilated Forefoot
  • Beveled Edge


Total: $34.99

Earn $1.05 in HPFY rewards

Why choose Superfeet Flex Insoles?

  • Superfeet insoles keep their shape, delivering reliable support and comfort for up to 12 months or 500 miles, whichever comes first
  • 4mm thickness; durable, viscoelastic closed-cell foam layer absorbs impact to deliver comfort that lasts
  • With long-lasting odor control
  • Contoured to stabilize and support the foot, reducing stress on feet, ankles and knees
  • Horseshoe-shaped heel cradle provides structure and stability
  • Improves air circulation and breathability
  • The beveled foam edge improves the fit in tighter fitting footwear
Superfeet Flex Shoe Inserts

What to buy with Flex Insoles

Compare Your Shoe Inserts

  Superfeet Flex Insoles Flex Max Insole Superfeet Green Insole



Flex Max

Green Insole


Athletic comfort

Athletic comfort

Comfort and pain relief

Insole thickness




Arch Type








Fits best in

Athletic footwear

Tighter fitting footwear

A wide variety of footwear

How to trim Superfeet Flex Arch Support Insoles?

  1. Remove the original insole from your shoes
  2. Put the original shoe insole on top of the new insole
  3. Line up and trace the insole using a pen
  4. Trim your new insole. Be sure the insole is trimmed correctly.
  5. Insert the trimmed shoe insole in your shoes

Flex Orthotic Insoles cleaning instructions

  • Handwash with mild soap and lukewarm water
  • Use an old toothbrush with soft bristles if needed
  • Rinse well, remove excess water with a soft towel and allow to air dry, but not near a heat source
  • Do not machine wash or dry

Superfeet Everyday Slim Fit Men Insoles FAQ's

Superfeet Flex Arch Support Inserts Size Chart

Insole Size Shoe Size
B Women 4.5 - 6/ Kids 2.5 - 4
D Women 8.5 - 10/ Men 7.5 - 9
E Women 10.5 - 12/ Men 9.5 - 11
F Women 12.5 - 14/ Men 11.5 - 13


Flex Inserts Warranty

Limited 60 days warranty

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