US
Samurai Insoles

Samurai Insoles Ninjas Arch Support Insoles

  • Polypropylene arch support, no foam or cushioning
  • 3/4 length, goes under the existing insole
  • 13 sizes; this one Mens 6-6.5/Womens 8-8.5
  • Shoes with removable insoles only
  • Podiatrist designed, made in the USA

Updated 20 days ago · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A firm, thin arch support for people who want structure without bulky foam, placed under a shoe's own insole. It needs an adjustment period and does not work directly against the foot.

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ASIN: B076K137TTCategory: Insoles

Sizes Available

Mens 4-4.5/Womens 6-6.5Mens 5-5.5/Womens 7-7.5Mens 6-6.5/Womens 8-8.5Mens 7-7.5/Womens 9-9.5Mens 8-8.5/Womens 10-10.5Mens 9-9.5/Womens 11-11.5Mens 10-10.5/Womens 12-12.5Mens 11-11.5/Womens 13-13.5Mens 12-12.5/Womens 14-14.5Mens 13-13.5/Womens 15-15.5Mens 14-14.5Mens 15-15.5Mens 16-16.5

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Overview

Samurai Insoles makes the Ninjas from springy polypropylene plastic, a thin arch shell that slides under the shoe's own insole to support the arch. There is no foam, so it adds structure rather than padding.

A thin plastic shell gives firm arch support that does not flatten or hold sweat. It must sit under an existing insole and can feel hard at first.

Who it's for

People wanting firm, lasting arch support in shoes with removable insoles get a thin, durable option. Those wanting cushioning or with fixed insoles should look elsewhere.

Pros and cons

Pros
  • Firm, springy arch support
  • Thin, fits under insoles
  • Does not compress like foam
  • Thirteen precise sizes
Cons
  • Needs removable insoles
  • Hard if used alone

Performance notes

Support comes from the springy polypropylene shell that holds the arch shape under load. Placing it under the original insole adds comfort on top. The plastic does not absorb sweat, so it stays fresh and holds its shape.

Specifications

BrandSamurai Insoles
Dimensions & fit
Shoe WidthM
SizeMens 6-6.5/Womens 8-8.5
Item dimensions6.69 x 2.36 x 0.79 inches
Construction & materials
Material TypePolypropylene
ColorPurple
Other details
Arch TypeMedium Arch
Insole TypeArch Support Insole, 3/4 length
Recommended Uses For ProductBoot, Cleat, Shoe, Slipper, Sneaker

Frequently asked questions

Do Samurai Insoles Ninjas get smelly or wear out?

They are polypropylene plastic with no foam, which the brand says avoids wear and tear, odors and soggy insoles.

Can I use Samurai Ninjas without my shoe's insole?

No. They must sit under the shoe's existing insole. Used directly against the foot they feel too hard, small or narrow.

Do Samurai Ninjas fit all shoes?

They are designed only for shoes with removable insoles, which may not be possible in all shoes.

How many sizes do Samurai Ninjas come in?

13 sizes. This listing is Mens 6-6.5/Womens 8-8.5.