Slimflex Comfort Plantar Fasciitis Insoles - High Density - 3/4 Length
Slimflex Comfort Insoles are NHS recommended insoles for plantar fasciitis and have several research articles backing their use in orthotic therapy
Our highest density Orthotic Insoles provide maximum foot control and arch support for highly pronated feet (flat feet).
High Density EVA 3/4 design for heavier patients and the very active such sportspeople and runners.
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Product Description
High Density Orthotic Support for Active and Heavier Users
Slimflex Comfort High Density 3/4 Length Orthotic Insoles are firm orthotic devices designed to provide strong biomechanical support and foot control in a compact format.
Manufactured from high-density A65 EVA, these insoles are suited to active individuals and heavier patients who require greater structural support than softer orthotics can provide.
Based on the trusted Slimflex Simple orthotic design, this version incorporates a brushed nylon comfort top cover while maintaining the same firm orthotic structure.
The three-quarter length design supports the heel and arch without extending into the forefoot, allowing the device to fit more easily into a wider range of footwear.
Frequently prescribed within the NHS, Slimflex Comfort insoles are used to support conditions such as plantar fasciitis, Achilles tendonitis, overpronation and hallux limitus.
The high-density EVA construction helps stabilise the foot, control excessive motion and provide reliable support during everyday walking and higher activity levels.
Key Selling Points
Maximum Foot Control
- High-density EVA provides strong biomechanical support
- Helps control excessive pronation and foot instability
- Improves overall foot alignment during walking
Compact 3/4 Length Orthotic
- Supports heel and arch without extending into the forefoot
- Fits more easily into tighter footwear
- Maintains space in the toe box
Designed for Active & Heavier Patients
- Very firm orthotic structure for higher loading
- Suitable for active lifestyles and demanding use
- Provides stronger structural support than softer insoles
Clinically Adaptable
- Heat mouldable and grindable construction
- Allows professional modifications and posting
- Commonly used in clinical practice
How they work
Slimflex Comfort High Density insoles support the foot through a firm EVA orthotic shell that stabilises the rearfoot0 and supports the medial arch. By improving foot alignment and controlling excessive motion during walking, the orthotic can help reduce strain placed on structures such as the plantar fascia, Achilles tendon and posterior tibial tendon.
The deep heel cup helps maintain correct heel positioning while the arch contour supports the midfoot and improves load distribution across the foot. The 3/4 length design focuses support where it is most needed — the heel and arch — while leaving the forefoot free for improved shoe fit.
This device is designed to provide strong biomechanical control rather than soft cushioning. Users seeking shock absorption or very soft comfort may prefer a lower density orthotic option.
Indications
- Plantar fasciitis
- Achilles tendonitis
- Overpronation and flat feet
- Hallux limitus or mild hallux rigidus
- Posterior tibial tendon dysfunction (PTTD)
- Shin splints
- Lateral ankle instability
- Pes cavus (high arches)
- Active individuals requiring strong orthotic control
- Heavier patients needing greater support
- Use in footwear where full-length orthotics may not fit
Product Specifications
| Product Name | Slimflex Comfort Orthotic Insoles – 3/4 Length |
| Material | High Density EVA (A65) |
| Top Cover | Brushed nylon comfort fabric |
| Design | 3/4 length orthotic insole |
| Heel Support | Deep heel cup for rearfoot stability |
| Profile | Slimline orthotic design |
| Modifiability | Heat mouldable and grindable |
| Packaging | Retail packed |
| Supply | Sold as a pair |
Usage Instructions
- Place the orthotic inside the shoe with the fabric side facing upward.
- Position the heel fully into the heel cup.
- The orthotic should sit comfortably beneath the heel and arch.
- Gradually increase wear time if new to firm orthotic devices.
- If discomfort persists, consult a healthcare professional.
Benefits
- Firm orthotic support for improved foot alignment
- Helps control excessive pronation
- Supports plantar fascia and Achilles tendon loading
- Deep heel cup improves rearfoot stability
- Compact design fits a wider range of footwear
- Strong support for active or heavier individuals
- Heat mouldable for professional customisation
- Comfort fabric top cover improves wearability
Contraindications & Warnings
- This orthotic is very firm and may not be suitable for users seeking soft cushioning insoles.
- Individuals with diabetes, circulatory disorders or foot ulcers should seek medical advice before use.
- Discontinue use if pain, irritation or discomfort develops.
- Persistent foot or lower limb pain should be assessed by a healthcare professional.
FAQs
What is the advantage of a 3/4 length orthotic?
A 3/4 length orthotic supports the heel and arch while leaving the forefoot free, allowing it to fit more easily into tighter shoes or footwear where full-length insoles may not fit comfortably.
Are these insoles suitable for plantar fasciitis?
Yes. The firm arch support and rearfoot control help reduce strain on the plantar fascia and support improved foot alignment.
Who should use high-density orthotic insoles?
High-density orthotics are typically recommended for active individuals or heavier patients who require stronger biomechanical support and motion control.
Can they help Achilles tendonitis?
Improving rearfoot alignment and controlling excessive pronation may help reduce loading on the Achilles tendon.
Do these insoles fit most shoes?
The slimline 3/4 length design allows them to fit inside many types of footwear, including dress shoes, work shoes and trainers.
Can clinicians customise these orthotics?
Yes. Slimflex Comfort orthotics are heat mouldable and grindable, allowing healthcare professionals to add posts, wedges or lifts where required.
Are they suitable for hallux rigidus?
The firm orthotic structure may help limit excessive forefoot motion during walking, which can reduce discomfort associated with mild hallux rigidus.
Summary
Slimflex Comfort Plantar Fasciitis Insoles – High Density (3/4 Length) are firm orthotic insoles designed to provide strong foot control and biomechanical support. Made from high-density EVA with a brushed nylon top cover, they stabilise the heel, support the arch and help control excessive pronation.
Commonly prescribed within the NHS, these orthotics are used for conditions such as plantar fasciitis, Achilles tendonitis, hallux limitus and flat feet. The compact 3/4 length design allows them to fit comfortably into a wide range of footwear while providing strong structural support.
Related Pages:
View are full orthotic insoles range
View our full Plantar Fasciitis range
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