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Product details list carbon fiber construction.
Listings describe the insoles as 'very rigid' and 'rigid' carbon fiber; shown thicknesses are 1.5 mm and 1.3 mm.
The listings also mention hallux limitus, Morton's toe, plantar fasciitis, turf toe, and metatarsal breaks.
Product details list sizes including a 5–6 range and a separate listing for 9.5; specific size availability varies by individual listing.
The listings include an adult-use warning and state the insoles are not intended to serve as arch support.
They are described as increasing foot stability and helping to relieve foot fatigue.
Each product listing specifies a package quantity of 1.
